
The German–Polish customs war was a political and economic conflict between the
Second Polish Republic
The Second Polish Republic, at the time officially known as the Republic of Poland, was a country in Central and Eastern Europe that existed between 7 October 1918 and 6 October 1939. The state was established in the final stage of World War I ...
and the
Weimar Republic
The Weimar Republic, officially known as the German Reich, was the German Reich, German state from 1918 to 1933, during which it was a constitutional republic for the first time in history; hence it is also referred to, and unofficially proclai ...
, which began in June 1925 (shortly after the death of
German president Friedrich Ebert
Friedrich Ebert (; 4 February 187128 February 1925) was a German politician of the Social Democratic Party of Germany, Social Democratic Party (SPD) who served as the first President of Germany (1919–1945), president of Germany from 1919 until ...
from
SPD) and ended officially in March 1934.
The conflict began when Poland's status expired as one of the
Entente's
most favoured nation
In international economic relations and international politics, most favoured nation (MFN) is a status or level of treatment accorded by one state to another in international trade. The term means the country which is the recipient of this treatme ...
s in trade with Germany.
[Nonreciprocal most favoured nation status for all Allies of World War I (Entente) countries was determined in the ]Versailles treaty
The Treaty of Versailles was a peace treaty signed on 28 June 1919. As the most important treaty of World War I, it ended the state of war between Germany and most of the Allied Powers. It was signed in the Palace of Versailles, exactl ...
. Berlin then decided to raise
customs duty
A tariff or import tax is a duty imposed by a national government, customs territory, or supranational union on imports of goods and is paid by the importer. Exceptionally, an export tax may be levied on exports of goods or raw materials and i ...
, which primarily affected the Polish coal industry, Poland's main export to Germany. In return, Warsaw also raised duty on German goods.
Germany's purpose in the war was to cause a breakdown of Poland's economy and gain
political concessions.
They included
revanchist
Revanchism (, from ''revanche'', "revenge") is the political manifestation of the will to reverse the territorial losses which are incurred by a country, frequently after a war or after a social movement. As a term, ''revanchism'' originated i ...
claims to Polish territories.
Background
In 1918, Poland gained independence after
123 years of foreign dominance. The economy of the newly created country was bad, the result of several wars fought on Polish soil between 1914 and 1921, and of many years of division between three partitioning powers. In 1919, industrial production on Polish lands fell by 70% in comparison to 1914, and the government in Warsaw had a difficult task.
The country was divided into different economic and political systems, with several kinds of currency in circulation. The
Baltic Sea
The Baltic Sea is an arm of the Atlantic Ocean that is enclosed by the countries of Denmark, Estonia, Finland, Germany, Latvia, Lithuania, Poland, Russia, Sweden, and the North European Plain, North and Central European Plain regions. It is the ...
port of the
Free City of Danzig
The Free City of Danzig (; ) was a city-state under the protection and oversight of the League of Nations between 1920 and 1939, consisting of the Baltic Sea port of Danzig (now Gdańsk, Poland) and nearly 200 other small localities in the surrou ...
was not part of Poland.
The lands of former
Congress Poland
Congress Poland or Congress Kingdom of Poland, formally known as the Kingdom of Poland, was a polity created in 1815 by the Congress of Vienna as a semi-autonomous Polish state, a successor to Napoleon's Duchy of Warsaw. It was established w ...
, which before 1914 had been responsible for 15% of industrial production of the
Russian Empire
The Russian Empire was an empire that spanned most of northern Eurasia from its establishment in November 1721 until the proclamation of the Russian Republic in September 1917. At its height in the late 19th century, it covered about , roughl ...
,
were cut off from eastern markets after the creation of the
Soviet Union
The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet ...
. In addition, the collapse of
Austria-Hungary
Austria-Hungary, also referred to as the Austro-Hungarian Empire, the Dual Monarchy or the Habsburg Monarchy, was a multi-national constitutional monarchy in Central Europe#Before World War I, Central Europe between 1867 and 1918. A military ...
destroyed the 19th century economic ties of
Galicia with Austria and
Bohemia
Bohemia ( ; ; ) is the westernmost and largest historical region of the Czech Republic. In a narrow, geographic sense, it roughly encompasses the territories of present-day Czechia that fall within the Elbe River's drainage basin, but historic ...
. Poland's closest ally, France, was far away, and trade with Paris was limited. Germany thus emerged as a main trade partner and market for Polish products, despite tensions between the two countries. In 1925, 40% of Polish foreign trade was with Germany, and Poland's western, most developed provinces, the Polish part of
Upper Silesia
Upper Silesia ( ; ; ; ; Silesian German: ; ) is the southeastern part of the historical and geographical region of Silesia, located today mostly in Poland, with small parts in the Czech Republic. The area is predominantly known for its heav ...
,
Greater Poland
Greater Poland, often known by its Polish name Wielkopolska (; ), is a Polish Polish historical regions, historical region of west-central Poland. Its chief and largest city is Poznań followed by Kalisz, the oldest city in Poland.
The bound ...
and
Pomerelia
Pomerelia, also known as Eastern Pomerania, Vistula Pomerania, and also before World War II as Polish Pomerania, is a historical sub-region of Pomerania on the southern shore of the Baltic Sea in northern Poland.
Gdańsk Pomerania is largely c ...
, were even more dependent on Germany, their powerful western neighbor. Until 1925, Polish Upper Silesia sold half of its coal to Germany; in Poland, there was little demand for the rest because industrial production in Polish territory was a fraction of what it had been; in 1921, it was a mere 35% of its 1913 level.
Polish-German relations
After World War I, the
German Empire
The German Empire (),; ; World Book, Inc. ''The World Book dictionary, Volume 1''. World Book, Inc., 2003. p. 572. States that Deutsches Reich translates as "German Realm" and was a former official name of Germany. also referred to as Imperia ...
lost its eastern
Province of Posen
The Province of Posen (; ) was a Provinces of Prussia, province of the Kingdom of Prussia from 1848 to 1920, occupying most of the historical Greater Poland. The province was established following the Greater Poland Uprising (1848), Poznań Uprisi ...
and
West Prussia
The Province of West Prussia (; ; ) was a province of Prussia from 1773 to 1829 and from 1878 to 1919. West Prussia was established as a province of the Kingdom of Prussia in 1773, formed from Royal Prussia of the Polish–Lithuanian Commonweal ...
to Poland, partially after uprisings by the Polish population in
Greater Poland
Greater Poland, often known by its Polish name Wielkopolska (; ), is a Polish Polish historical regions, historical region of west-central Poland. Its chief and largest city is Poznań followed by Kalisz, the oldest city in Poland.
The bound ...
and
Silesia
Silesia (see names #Etymology, below) is a historical region of Central Europe that lies mostly within Poland, with small parts in the Czech Silesia, Czech Republic and Germany. Its area is approximately , and the population is estimated at 8, ...
. These areas (Greater Poland and
Gdańsk Pomerania
Gdańsk Pomerania (; ; ) is the main geographical region within Pomerelia (also known as Vistula Pomerania, Eastern Pomerania, and previously Polish Pomerania) in northern Poland, covering the bulk of Pomeranian Voivodeship. In contrast to ''Pome ...
) had been taken by Prussia in the
Polish Partitions. Further territorial claims of Poland were settled in the
East Prussian plebiscite
The East Prussian plebiscite (), also known as the Allenstein and Marienwerder plebiscite or Warmia, Masuria and Powiśle plebiscite (), was a plebiscite for the self-determination of the regions of southern Warmia (Ermland), Masuria (Mazury, Ma ...
and the
Upper Silesia plebiscite
The Upper Silesia plebiscite was a plebiscite mandated by the Versailles Treaty and carried out on 20 March 1921 to determine ownership of the province of Upper Silesia between Weimar Germany and the Second Polish Republic. The region was ethni ...
. While Germany controlled the territories, more than 154,000 German colonists settled in the region, in addition to at least 378.000 German military and officials which were stationed in Polish territories.
[Germany and Poland:
from war to peaceful relations, Władysław Wszebór Kulski, page 24, Syracuse University Press, 1976]

In the early interwar period, in Germany, the Second Polish Republic was regarded a "temporary state" ("Saisonstaat") and tensions between the two nations were high. The German-Polish border was never officially accepted by Germany and from the start of 1919 German foreign policy aimed at revising the Versailles Treaty and acquiring once more Polish territories. To pursue its goals of territorial revisionism, Germany emphasized the presence of a German minority in Poland. In 1924, the situation in Germany improved, both internally and internationally. On 30 August 1924 in Vienna Convention, both governments agreed on the eviction of at least 28,000 Germans living in Poland who had chosen German citizenship ("Optanten" in German) and of 5,000 Poles living in Germany who had chosen Polish citizenship ("Optanci" in Polish).
The Weimar Republic, which in 1926 became a member of the
League of Nations
The League of Nations (LN or LoN; , SdN) was the first worldwide intergovernmental organisation whose principal mission was to maintain world peace. It was founded on 10 January 1920 by the Paris Peace Conference (1919–1920), Paris Peace ...
, enjoyed a period of relative prosperity, which had a positive effect on Poland.
The population in the territories of Silesia and parts of Poland of the former
Prussian partition
The Prussian Partition (), or Prussian Poland, is the former territories of the Polish–Lithuanian Commonwealth acquired during the Partitions of Poland, in the late 18th century by the Kingdom of Prussia. The Prussian acquisition amounted to ...
, a significant minority of them ethnic Germans, became Polish citizens. Ethnic Germans were entitled to "opt" for German citizenship and leave the country; this group was called "Optanten".
The Polish government sought to keep the granting of citizenship in tight limits; people who left the area in the post-war turmoils (the majority of whom were former German military personnel and officials stationed on Polish territory
) were regarded "tacit Optants".
According to the Minorities Treaty (also called the "Little Versailles Treaty") signed by Poland, all former citizens of partitioning powers who rejected Polish citizenship had to leave the country by 10 January 1923. This concerned citizens of Russia, Hungary, Austria and Germany, though in the case of Germans opting for German citizenship, there was no precise date established for them to leave.
Per the treaty of Versailles, the victorious countries, including Poland, were authorized to liquidate the property of German nationals.
Helmut Lippelt writes that Germany used the existence of the German minority in Poland for political purposes and as part of its revanchist demands, prompting Polish countermeasures. Polish Prime-Minister
Władysław Sikorski
Władysław Eugeniusz Sikorski (; 20 May 18814 July 1943) was a Polish military and political leader.
Before World War I, Sikorski established and participated in several underground organizations that promoted the cause of Polish independenc ...
stated in 1923 that the de-Germanization of these territories had to be ended by vigorous and quick liquidation of property and eviction of German "Optanten"; German nationalists were to be convinced that their view of the temporary state of Poland's western border was wrong.
To Lippelt this was partially a reaction to the German claims and partially nationalism, urging to exclude the German element. In turn, German policy was fueled by anti-Polish prejudice.
In 1925,
Gustav Stresemann
Gustav Ernst Stresemann (; 10 May 1878 – 3 October 1929) was a German statesman during the Weimar Republic who served as Chancellor of Germany#First German Republic (Weimar Republic, 1919–1933), chancellor of Germany from August to November 1 ...
proposed an agreement with France (the
Locarno Treaties
The Locarno Treaties, known collectively as the Locarno Pact, were seven post-World War I agreements negotiated amongst Germany, France, Great Britain, Belgium, Italy, Second Polish Republic, Poland and First Czechoslovak Republic, Czechoslovak ...
) and made it clear that in doing so, he intended to "gain a free hand to secure a peaceful change of the borders in the East and
..concentrate on a later incorporation of German territories in the East".
Stresemann refused to engage in any international cooperation that would have "prematurely" stabilized the Polish economy. In response to a British proposal, Stresemann wrote to the German ambassador in London, "
final and lasting recapitalization of Poland must be delayed until the country is ripe for a settlement of the border according to our wishes and until our own position is sufficiently strong". According to Stresemann's letter, there was to be no settlement "until
oland'seconomic and financial distress ha
reached an extreme stage and reduced the entire Polish body politic to a state of powerlessness".
However, Stresemann did not intend to provoke a trade war.
The German press openly praised the trade war, hoping it would lead to destruction of the Polish state. As the ''
Frankfurter Zeitung
The ''Frankfurter Zeitung'' (, ) was a German-language newspaper that appeared from 1856 to 1943. It emerged from a market letter that was published in Frankfurt. In Nazi Germany, it was considered the only mass publication not completely control ...
'' wrote on 14 June 1924, "Poland must be mortally wounded after the trade war. With her blood her strength will flow away as well, and finally her independence"
Customs war between Poland and Germany
In the immediate post-World War I period, trade between both nations was regulated by the
Treaty of Versailles
The Treaty of Versailles was a peace treaty signed on 28 June 1919. As the most important treaty of World War I, it ended the state of war between Germany and most of the Allies of World War I, Allied Powers. It was signed in the Palace ...
and by the
Geneva Convention
upright=1.15, The original document in single pages, 1864
The Geneva Conventions are international humanitarian laws consisting of four treaties and three additional protocols that establish international legal standards for humanitarian t ...
on Upper Silesia (1922). The Treaty of Versailles required Germany to give most favoured nation status unilaterally to all
Triple Entente
The Triple Entente (from French meaning "friendship, understanding, agreement") describes the informal understanding between the Russian Empire, the French Third Republic, and the United Kingdom of Great Britain and Ireland. It was built upon th ...
countries as well as to its newly created eastern neighbors. The export of goods produced in the former territories of the German Empire now in the Second Polish Republic was generally tax-free,
to avoid economic collapse of the territories. According to the Geneva Convention, Germany was obliged to allow export of specified quantities of coal from the Polish part of Upper Silesia. Both documents were valid until 15 June 1925.
In June 1924, a new customs law was passed in Poland. Its aim was to protect the Polish market from foreign competitors and cover increased financial needs. It was supposed to serve as a basis for future trade agreements.
While divergent terms were settled in bilateral treaties between Poland and France,
Czechoslovakia
Czechoslovakia ( ; Czech language, Czech and , ''Česko-Slovensko'') was a landlocked country in Central Europe, created in 1918, when it declared its independence from Austria-Hungary. In 1938, after the Munich Agreement, the Sudetenland beca ...
,
Hungary
Hungary is a landlocked country in Central Europe. Spanning much of the Pannonian Basin, Carpathian Basin, it is bordered by Slovakia to the north, Ukraine to the northeast, Romania to the east and southeast, Serbia to the south, Croatia and ...
and
Greece
Greece, officially the Hellenic Republic, is a country in Southeast Europe. Located on the southern tip of the Balkan peninsula, it shares land borders with Albania to the northwest, North Macedonia and Bulgaria to the north, and Turkey to th ...
, the taxes on other imports were raised 100%.
[
Poland asked for renewal of the trade privileges but refused to grant most favoured nation status to German goods. In the negotiations of early 1925, Germany tried to buy time by raising trade and minority issues, such as the "Optanten" problem, ]liquidation
Liquidation is the process in accounting by which a Company (law), company is brought to an end. The assets and property of the business are redistributed. When a firm has been liquidated, it is sometimes referred to as :wikt:wind up#Noun, w ...
measures and settlement rights; on 15 June, the relevant clauses of the treaty would expire. Germany demanded Poland to give up undisputed rights from the Treaty of Versailles and to revise the Vienna Convention, closed six months earlier. The Germans hoped that Poland would make concessions, and once again, German businessmen would follow German trade across the border. That was a sensitive issue for Poland, having just thrown off German political and economic influence.
Also, Germany demanded privileges for the German minority.
In January 1925, when Germany recovered its trade policy sovereignty, all purchases of Polish coal were stopped and customs duties
A tariff or import tax is a duty (tax), duty imposed by a national Government, government, customs territory, or supranational union on imports of goods and is paid by the importer. Exceptionally, an export tax may be levied on exports of goods ...
raised on all Polish-made products. Some Polish exports were subject to a German embargo
Economic sanctions or embargoes are commercial and financial penalties applied by states or institutions against states, groups, or individuals. Economic sanctions are a form of coercion that attempts to get an actor to change its behavior throu ...
.
Warsaw responded by raising tariffs on German goods. Negotiations began in Berlin on 3 March 1925. Germany demanded more privileges for the German minority in Poland as a pre-condition for resumption of the coal trade, but Warsaw refused.
The zloty lost value, with a reduction of the Polish industrial output. The most-affected area was Polish Upper Silesia, the most developed part of the nation but also the one most dependent on trade with Germany. In November 1925, the government of Władysław Grabski
Władysław Dominik Grabski (; 7 July 1874 – 1 March 1938) was a Polish National Democratic politician, economist and historian. He was the main author of the currency reform in the Second Polish Republic and served as Prime Minister of Pola ...
collapsed.
Germany also blocked Polish attempts to get a British loan from, as Germany planned to annex Polish territory after the fall of the Polish state.
When Polish delegations tried to reach a peaceful understanding with Germany on 10 December 1926, Stresemann rejected the talks by saying there would be no normalization of German-Polish relations until the "border problems" were resolved. To clarify, he identified Upper Silesia, Pomerania and Danzig (Gdańsk
Gdańsk is a city on the Baltic Sea, Baltic coast of northern Poland, and the capital of the Pomeranian Voivodeship. With a population of 486,492, Data for territorial unit 2261000. it is Poland's sixth-largest city and principal seaport. Gdań ...
) as "border problems". Reichsbank
The ''Reichsbank'' (; ) was the central bank of the German Empire from 1876 until the end of Nazi Germany in 1945.
Background
The monetary institutions in Germany had been unsuited for its economic development for several decades before unifica ...
President Hjalmar Schacht
Horace Greeley Hjalmar Schacht (); 22 January 1877 – 3 June 1970) was a German economist, banker, politician, and co-founder of the German Democratic Party. He served as the Currency Commissioner and President of the Reichsbank during the ...
agreed and stated that any economic agreements with Poland must be preceded by Poland's relinquishment of Upper Silesia and the Polish Corridor to Germany. Robert Spaulding wrote that over time "German political demands grew fantastic".
Officially, the customs war lasted until March 1934 and was settled after the German–Polish declaration of non-aggression. Poland was aided to some extent by Czechoslovakia, Austria
Austria, formally the Republic of Austria, is a landlocked country in Central Europe, lying in the Eastern Alps. It is a federation of nine Federal states of Austria, states, of which the capital Vienna is the List of largest cities in Aust ...
and Italy, whose governments reduced rail tariffs on Polish exports and transit, increasing export of Polish coal to there.[
Also, Scandinavian markets also opened to Poland because of ]1926 United Kingdom general strike
The 1926 general strike in the United Kingdom was a general strike that lasted nine days, from 4 to 12 May 1926. It was called by the General Council of the Trades Union Congress (TUC) in an unsuccessful attempt to force the British government ...
.
Aftermath
The Polish government, facing a breakdown in international trade, was forced to initiate a program of internal investment, which resulted in the growth of local production. Unemployment was reduced by a mass public works program, with two important components, the construction of the new Baltic Sea port of Gdynia
Gdynia is a city in northern Poland and a seaport on the Baltic Sea coast. With an estimated population of 257,000, it is the List of cities in Poland, 12th-largest city in Poland and the second-largest in the Pomeranian Voivodeship after Gdańsk ...
, and the Polish Coal Trunk-Line
The Coal Trunk-Line () is one of the most important rail connections in Poland.
It crosses the central part of the country, from the coal mines and steelworks of Upper Silesia in the South to the Baltic Sea port of Gdynia in the North. The line ...
, a rail connection between Upper Silesia and Gdynia. Since the zloty had lost much of its value, export of Polish coal to Scandinavia
Scandinavia is a subregion#Europe, subregion of northern Europe, with strong historical, cultural, and linguistic ties between its constituent peoples. ''Scandinavia'' most commonly refers to Denmark, Norway, and Sweden. It can sometimes also ...
became profitable.
Paradoxically, the trade war had some positive consequences. Poland found new trade partners, making their economy less dependent on Germany overall, a domestic modernization program was successfully accelerated and the port of Gdynia enjoyed dynamic growth. However at the same time, poverty and unemployment sharply increased, resulting in labor strikes and demonstrations. The political mood became increasingly radicalized culminating in the May Coup d'État of 1926, carried out by Jozef Pilsudski and considered the most politically significant consequence of the trade war.
In contrast, for Germany, the customs war had a negligible effect, as exports to Poland were only 4–5% of German international trade.
Notes
References
{{DEFAULTSORT:German-Polish customs war
Germany–Poland relations (1918–1939)
Economy of the Second Polish Republic
Economy of the Weimar Republic
Trade wars
Foreign trade of Poland
Diplomatic crises of the 20th century