Eastern Silesia was formerly the

Austria Austria, , bar, Östareich officially the Republic of Austria, is a country in the southern part of Central Europe, lying in the Eastern Alps. It is a federation of nine states, one of which is the capital, Vienna, the most populous ...

n crownland

Austrian Silesia Austrian Silesia, (historically also ''Oesterreichisch-Schlesien, Oesterreichisch Schlesien, österreichisch Schlesien''); cs, Rakouské Slezsko; pl, Śląsk Austriacki officially the Duchy of Upper and Lower Silesia, (historically ''Herzogth ...

, which was occupied by

Czechoslovakia , rue, Чеськословеньско, , yi, טשעכאסלאוואקיי, , common_name = Czechoslovakia , life_span = 1918–19391945–1992 , p1 = Austria-Hungary , image_p1 ...

after

World War I World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was List of wars and anthropogenic disasters by death toll, one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, ...

. It had an area of 1,987 sq mi (5,146 km²), with a population of 680,422 in 1900. The capital was

Opava Opava (; german: Troppau, pl, Opawa) is a city in the Moravian-Silesian Region of the Czech Republic. It has about 55,000 inhabitants. It lies on the river Opava. Opava is one of the historical centres of Silesia. It was a historical capital of ...

. Plans for a

plebiscite A referendum (plural: referendums or less commonly referenda) is a direct vote by the electorate on a proposal, law, or political issue. This is in contrast to an issue being voted on by a representative. This may result in the adoption of ...

fell through, and the area was divided between Czechoslovakia and

Poland Poland, officially the Republic of Poland, is a country in Central Europe. It is divided into 16 administrative provinces called voivodeships, covering an area of . Poland has a population of over 38 million and is the fifth-most populou ...

. The territory was entered by the Czech military on 23 January 1919, after negotiations with Poland broke down. A final agreement on the border was reached on 28 July 1920.

Postage stamps

Eastern Silesia is remembered today by

philatelist Philately (; ) is the study of postage stamps and postal history. It also refers to the collection and appreciation of stamps and other philatelic products. Philately involves more than just stamp collecting or the study of postage; it is possi ...

s, since the plans for the plebiscite included the issuance of special

postage stamp A postage stamp is a small piece of paper issued by a post office, postal administration, or other authorized vendors to customers who pay postage (the cost involved in moving, insuring, or registering mail), who then affix the stamp to the f ...

s. These were stamps of Czechoslovakia and Poland,

overprint An overprint is an additional layer of text or graphics added to the face of a Postage stamp, postage or revenue stamp, postal stationery, banknote or Ticket (admission), ticket after it has been Printing, printed. Post offices most often use ...

ed with various combinations of "SO" or "S. O." ( Fr. ''Silesie Orientale''), and "1920". They were in use from February to September 1920. The overprints were produced in considerable numbers; with a few exceptions, the stamps are commonly available today at the minimum price. The postal history of the territory is quite complicated, with both overprinted and stamps of the contending countries (and Austria) in use at different post offices at different times.

External links

In-depth article on Eastern Silesia and its postal history
{{coord missing, Czech Republic Habsburg Silesia History of Czech Silesia