The conquest of all of Mieszko I's Pomerania (of which the remaining eastern part had been lost by Poland from after the death of Mieszko II), a task begun by his father and completed by Boleslaw III around 1123, is one of Boleslaw's major achievements.

Szczecin is subdued in a bloody takeover and …

...the margraves divert a contingent of crusaders to attack central Pomerania instead.

The countryside of Mecklenburg and central Pomerania is plundered and depopulated with much bloodshed, especially by the troops of Henry the Lion.

Of Henry's campaigns, Helmold of Bosau writes that "there was no mention of Christianity, but only of money".

The Slavic inhabitants have also lost much of their methods of production, limiting their resistance in the future.

The crusaders reach the already Christian city Stettin, whereupon the crusaders disperse after meeting with Pomerania’s Bishop Adalbert and Christian duke Ratibor I.

Duke Wartislaw I of Pomerania had continued to struggle against Polish overlordship.

In 1181, Wartislaw's son Duke Bogislaw I of Pomerania becomes a vassal of Emperor Frederick.

Swietopolk II, the Polish duke of Pomerania, sensing a threat in the expanding military-monastic state of the Teutonic Knights, initiates war in 1242 by encouraging a Prussian insurrection.

The peace talks that began in 1247 had achieved little, but a new truce had been arranged in September 1248 and peace is made on November 24, 1248.

Swietopolk has to return lands seized from his brothers, allow Teutonic Knights to pass through his domains, stop charging tolls on ships using the Vistula, and stop any aid to the Prussians.

Stettin, the capital and largest town of Pomerania by the twelfth century, had joined the ten-year Rostock Peace Treaty in 1283, which was the predecessor of the federation of Wendish towns.

The city has prospered due to the participation in the Baltic Sea trade, primarily with herrings, grain and timber; also craftmanship prospers and more than forty guilds have been established in the city.

The city joins the Hanseatic League in 1360, and will gradually adopt the role of a chief city for the Pomeranian Hanseatic towns to its east.

The Swedes, triumphant in Danish-ruled Norway in the Danish-Swedish War of 1563-1570 (Northern, or Scandinavian, Seven Years War), had subsequently lost their captured territory, while the Danes had similarly been unable to retain their conquests.

John ends the Scandinavian Seven Years' War in 1570 without many Swedish concessions: by the terms of the peace signed at Stettin, the borders of the two nations remain essentially unchanged: Denmark receives Gotland and Elfsborg (Alvsborg), along with some monetary reparations, from Sweden.

Denmark is provisionally granted the right to display the Swedish triple-crown insignia, but Sweden is barred from incorporating Danish or Norwegian arms.

Both Brandenburg and Sweden had claimed succession in the Duchy of Pomerania after the extinction of the local House of Pomerania during the Thirty Years' War.

During the war, Sweden had occupied the Duchy of Pomerania in 1630. her possession secured by the Treaty of Stettin (1630).

After the death of the last Griffin duke, Bogislaw XIV, in 1637, his duchy was supposed to be inherited by Brandenburg, who based her claims on in the Treaty of Grimnitz (1529).

This however had been hindered by the Swedish presence.

Under the terms of the 1648 Peace of Westphalia that had ended the war, Pomerania was to be partitioned between Brandenburg and Sweden.

The 1650 Treaty of Nuremberg had roughly defined the areas that should be under control of Sweden and Brandenburg, respectively.

The Treaty of Stettin, signed on July 19, 1653, determines the actual border, partitioning the Duchy of Pomerania along a line running east of the Oder river.

The areas west of this line (Vorpommern, including Stettin) stay with Sweden and hence are referred to as Swedish Pomerania.

The areas east of the line (Farther Pomerania) are to be transferred to Brandenburg.

Half of the customs revenues of the Farther Pomeranian towns are the prerogative of Sweden even after her withdrawal.

The treaty consolidates Sweden's control of the Oder estuary, adding to Sweden's gain of control at the lower Weser and Elbe rivers from the Peace of Westphalia.

Thus, the treaty consolidates Sweden's control over the mouths of all major German rivers, except for the Rhine.

Swedish Pomerania becomes the largest territorial foothold of Pomerania in Germany.

The attack of Frederick III of Denmark provides an opportunity for Charles X Gustav to abandon the unfortunate Polish-Lithuanian battlefields.

He marches with nine thousand nine hundred and fifty horse and twenty-eight hundred foot through Pomerania and ...

...besieges Stettin and ...