Carl Gustav Rehnskiöld

Count Carl Gustav Rehnskiöld (6 August 1651 – 29 January 1722) was a Swedish Field Marshal ('' Fältmarskalk'') and Royal Councillor. He was mentor and chief military advisor to King Charles XII of Sweden, and served as deputy commander-in-chief of the Carolean Army, an army he assisted both in its education and development.

Rehnskiöld grew up in Swedish Pomerania and studied at Lund University. He entered Swedish war service in 1673 and participated with distinction in the Battles of Halmstad, Lund, and Landskrona during the Scanian War, where he was appointed Lieutenant-Colonel and Adjutant-General. After the war, he was commander of several regiments, observer and tutor to Duke Frederick IV during the Nine Years' War, and Governor-General of Scania.

In the Great Northern War he was Charles XII's right-hand man in the operative organization of the Carolean Army and drafted the battle plans for the landing at Humlebæk and for the battles of Narva, Düna and Kliszów. In the Battle of Fraustadt in 1706, with his own independent army, he decisively defeated a Saxon-Russian Army under the command of Field Marshal Schulenburg. For his services, Rehnskiöld was appointed Field Marshal and the title of Count. During Charles XII's campaign against Russia, Rehnskiöld was in command during the Battle of Holowczyn and the siege of Veprik, where he was severely injured. After Charles XII became incapacitated by a bullet wound, Rehnskiöld replaced him as commander-in-chief of the Swedish Army during the Battle of Poltava in 1709, where it suffered a decisive defeat.

After the battle, Rehnskiöld became a prisoner of war in Russia and spent the years in captivity together with Count Carl Piper by running a management office in Moscow to assist the other Swedish prisoners of war. Rehnskiöld was exchanged in 1718 and arrived at the siege of Fredriksten just before Charles XII was shot to death. Rehnskiöld later served as commander in western Sweden and, suffering from an old shrapnel injury, died in 1722.

Childhood and Education (1651–1676)

Rehnskiöld was born on 6 August 1651 in Stralsund in Swedish Pomerania. His parents were the government councillor of Pomerania, Gerdt Antoniison Rehnskiöld (1610−1658), originally Keffenbrinck, and Birgitta Torskeskål (died 1655), niece of Baron Johan Adler Salvius. Keffenbrinck's ancestors came from Westphalia, and their seat was the castle of Rehne in the northern part of the Münsterland province. Gerdt Rehnskiöld initially served as a scribe in Kammarkollegium, and later as the authorized representative of the Crown at King Gustavus Adolphus' administrative entourage during the King's military campaign in Germany. Thanks to his efforts in the maintenance of the Swedish troops during the Thirty Years War, he became a naturalized Swedish nobleman in 1639 by Queen Kristina and adopted the name Rehnskiöld after his family seat. He was also awarded the Griebenow, Willershusen, and Hohenwarth estates in Pomerania, as well as Stensättra farm in Södermanland. In 1640, the Rehnskiöld family was introduced in the House of Nobility at number 270.Palmgren (1845), p. 48Rosander (2003), p. 262

Carl Gustav Rehnskiöld was the eighth of the Rehnskiölds' eleven children. After his father's death in 1658, Carl Gustav had two brothers and two sisters. The government councillor Philip Christoff von der Lancken and the regional councillor Joachim Cuhn von Owstien, both close friends to Gerdt Rehnskiöld before his death, received custody over the five siblings. The siblings suffered from financial hardship, partly due to Gerdt's money problems during the latter part of his life, and partly because of inheritance disputes between the five siblings and Gerdt Rehnskiöld's third wife and widow Anna Catharina Gärffelt. The guardians had granted her Birgitta Rehnskiöld's family jewelry and 14,000 riksdaler from the heritage. As a result, the siblings complained about their guardians' way of treating them and wrote several letters of complaint to the Swedish government. Carl Gustav Rehnskiöld's brother-in-law Anders Appelman later came to participate more actively in the upbringing of the five siblings, and gave funds to Carl Gustav's and his brothers' continued education. Carl Gustav Rehnskiöld undertook home education and entered Lund University, who took notice of the keen student and offered individual lessons under his tutelage. Pufendorf left a lasting impression. Rehnskiöld re-wrote Pufendorf's work ''Einleitung zur Historie der vornehmsten Reichen und Staaten in Europa'' (printed in Frankfurt only in 1682), provided the manuscript with Pufendorf's personal comments, and kept it for the remainder of his life.

Rehnskiöld joined the Swedish Army at the age of 22, and in 1673 obtained a commission as Ensign at Captain Reinhold Anrep's company in the Närke-Värmland Regiment. Already in the following year, he was appointed Lieutenant at the Queen Dowager of the Realm's Horse Life Regiment. In July 1675, he transferred to the Uppland Regiment, and on 12 February 1676 he became an officer of the prestigious Life Guards.

Scanian War (1676–1679)

During the early stages of the Scanian War, Rehnskiöld served at sea with a company of the Life Guards. He was then commanded ashore on the Scanian theater and, during the night between 31 July and 1 August 1676, he carried out his first military operation at Tostebro. Along with parts of his company he conquered a Danish entrenched position after a short battle. When informed of this, King Charles XI made him Captain of the Life Guards, with whom he participated in the Battle of Halmstad on 17 August 1676.Konow (2001), pp. 24−27

Back in the Horse Life Regiment, this time as '' ryttmästare'', Rehnskiöld participated in the Battle of Lund. After his squadron commander Lindhielm was wounded during the battle, Rehnskiöld replaced him and lead his squadron against the enemy. Charles XI was highly impressed by Rehnskiöld's bravery, promoting him on the battlefield to Major and transferring him to be Adjutant-General in the General Staff under Erik Dahlbergh's guidance and supervision. When the Swedish Army retreated from Rönneberga in May 1677, he alternately commanded the van- and rearguards, participating in numerous skirmishes. His efforts won the praise of Dahlbergh, who called Rehnskiöld "one of the most promising young officers in the army" in the presence of Charles XI. In the Battle of Landskrona, Rehnskiöld, along with his two companies, was surrounded by Danish elite units, and the Life Regiment's casualties were the highest among the Swedish regiments participating in the battle. On 5 November 1677, Rehnskiöld was promoted to Lieutenant-Colonel at the age of 26. He took effective command of the Queen Dowager of the Realm's Horse Life Regiment since its commander, General Rutger von Ascheberg, was commanded elsewhere. Rehnskiöld became a long-standing friend to von Ascheberg, who was Charles XI's chief military advisor and mentor, and whom Rehnskiöld regarded as his teacher in the art of war.Palmgren (1845), p. 49Rosander (2003), p. 263

In the last two years of the war, Rehnskiöld served on the Norwegian front in Bohuslän and participated in the relief of Bohus Fortress, where his career came close to an abrupt end when he was fired upon by a fortified Norwegian force. At Uddevalla's redoubt, he was the main reason that a Danish relief attempt was repelled.

Interlude before the Great Northern War (1679–1700)

In 1679, peace was concluded with Denmark and the Carolean army was demobilized. Rehnskiöld's rapid rate of promotion slowed: the rank of Colonel and raising his own regiment had to wait. In peacetime, Rehnskiöld was acting Lieutenant-Colonel and Adjutant-General, and learnt much about military logistics which proved to be useful in the future. He remained a dutiful royal servant, being one of the "promising young men" mentioned by Charles XI in a letter to Dahlbergh in 1682. In 1689 he became Colonel of the German Foot Life Regiment, an enlisted garrison regiment accommodated in Landskrona, Halmstad, Karlskrona, Malmö, and Helsingborg. With this position, he was made Commandant of Landskrona Citadel.Konow (2001), pp. 28−31

During 1690 and 1691 the Dutch Republic negotiated with Sweden for volunteers to fight in the war against France. The Swedish King provided 6,000 men, and Rehnskiöld, with the King's blessing, traveled to the Netherlands in the late summer of 1691. For three months he served as a military observer and military tutor to Prince Frederick of Holstein-Gottorp. Rehnskiöld reported to Charles XI on King William III and the Grand Alliance's joint operations, and the lack of discipline among the Allied forces. Rehnskiöld had to personally intervene in a disciplinary trial between the young Swedish officers Axel Gyllenkrok and Carl Magnus Posse. They volunteered for the French Army and tried to escape to the Allied camp in Flanders, where they were arrested but were released after they protested. Charles XI ordered Rehnskiöld to express his stern dissatisfaction to the young officers; through their undisciplined course of action, they had earned the condemnation of the foreign soldiers and, according to the King, they should have acted in accordance with prevalent soldierly manners.

On his return to Sweden in 1693 Rehnskiöld received the colonelcy of the Scanian Cavalry Regiment; he was made Major-General of cavalry in 1696. After von Ascheberg's death in April 1693, Rehnskiöld came to finish his work of renewing the old allotment system, becoming Charles XI's chief military steward, and was employed in matters of tactics and education. In Herrevad Abbey and Ljungbyhed he organized extensive training activities for his regiment, and worked hard making it well-equipped and combat effective. Under his tutelage, the Scanian Cavalry Regiment became a model regiment in the Swedish cavalry. When Charles XI died in 1697, he was succeeded by his son Charles XII. The new King granted Rehnskiöld the title of Baron, appointed him Governor-General of Scania and Lieutenant-General of cavalry.Konow (2001), pp. 39-44, 48

Rehnskiöld was instrumental in the development of Carolean combat tactics, based on the "national school" which itself derived from the offensive tactics designed by Gustavus Adolphus, Johan Banér and Charles X Gustav. Charles XI was a strong advocate of the national school, which was designed by Rutger von Ascheberg and Erik Dahlbergh. Their disciples, Rehnskiöld and Quartermaster General Carl Magnus Stuart, educated Charles XII in this kind of warfare, and when Stuart was appointed Governor-General of Courland in 1701, Rehnskiöld became the King's chief military adviser and mentor. Rehnskiöld advocated that the infantry should be organized into battalions of 600 men, one-third pikemen and two-thirds musketeers. They would carry out rapid marches with pikes and drawn swords after giving a close-range volley. The cavalry would be divided into companies of 125 men, which would charge in clustered wedge formations at full speed. This tactic was in stark contrast to the continental pattern, which advocated counter-marching during firing and caracole tactics. The Swedish units would come from the same region and thus be able to create strong bonds between the soldiers and officers. Strict discipline and high morale among the troops would be maintained through the Christian religion, and the allegiance sworn to the King and to their regimental colors and standards.

As Governor-General, Rehnskiöld asserted the Crown's interests in Scania through cultivation of crown land, forest management, and by counteracting a famine before a suspected bad harvest. He completed the province's military allotment and was tasked with setting the kingdom's plan of defense for a coming war with Denmark. Denmark had a tense relationship with the Duchy of Holstein-Gottorp to the south, which was allied with Sweden. Rehnskiöld advocated that the border provinces of the Swedish Empire would constitute its strongest defense; each province would be defended by its own allotted regiments. The eastern provinces were reinforced with Finnish allotted regiments and over 100 permanent forts, guarded by enlisted garrison regiments. For the kingdom to have a successful defense the Swedish Navy must have dominion over the Baltic Sea, to provide troop transports and maintain supply lines. Since the army was short of dragoon regiments, Rehnskiöld implored permission to set up his own regiment through recruitment, and, in 1700, he founded the Life Dragoon Regiment. Lieutenant-Colonel Hugo Johan Hamilton was appointed its second-in-command. Rehnskiöld wanted to make it an elite unit fighting at the King's side, and it would consist only of men from mainland Sweden. In Scania, Rehnskiöld was the owner of Allerup and Torup farms. He owned the largest collection of oxen in all of Scania; 112 pairs in total. He was succeeded as Governor-General by Magnus Stenbock in 1705.

On 17 January 1697, Rehnskiöld married Elisabeth Funck, daughter of the assessor in Bergskollegium Johan Funck. Rehnskiöld was thus brother-in-law to Carl Magnus Stuart, who was married to his wife's older sister Margaretha Funck. In 1699, a daughter was born to the couple, who died before she was one year old. Rehnskiöld then left Sweden to embark on the Great Northern War, reuniting with his wife on the spring of 1707 in the castle of Altranstädt.

Great Northern War (1700–1709)

Campaign in Denmark and the Baltics

The Great Northern War began on 12 February 1700. The King of Poland and Elector of Saxony, Augustus II, crossed the Düna river with his Saxon troops and besieged the city of Riga in Swedish Livonia. Riga was defended by Governor-General Erik Dahlbergh. Simultaneously, King Frederick IV of Denmark and his Danish troops invaded Holstein-Gottorp and laid siege to Tönning on March.Rosander (2003), p. 264

Throughout the Swedish Empire the allotted regiments were mobilized and ordered to march to southern Sweden. The standing army consisted of 77,000 men, of which 10,000 were sent to the Norwegian border and 16,000 were gathered in Scania to fight against Denmark. Rehnskiöld was commander of the army's deployment in Scania, which he later commanded, and was appointed leader of the operational army headquarters, serving directly under the King. The Swedish ministry of foreign affairs, under Bengt Gabrielsson Oxenstierna, advised Charles XII to relieve Livland, but the King chose to first avert the Danish threat, and Rehnskiöld passed the King's decision to Oxenstierna.

In mid-July 1700, the Swedish Army command decided to land Swedish troops on Zealand. The main landing would be concentrated in Køge Bugt south of Copenhagen under the command of Rehnskiöld, while a small unit would land at Humlebæk

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