 Complete the following phrase:  On February 14, the remts of German Army Group Vistula Heeresgruppe Weichsel had managed to set up a frontline roughly at the provinces southern frontier, and launched a counterattack Operation Solstice, Sonnenwende on February 15, that however stalled already on February 18. On February 24, the Second Belorussian Front launched the East Pomeranian Offensive and despite heavy resistance primarily in the Rummelsburg area took eastern Farther Pomerania until March 10. On March 1, the First Belorussian Front had launched an offensive from the Stargard and Märkisch Friedland area and succeeded in taking northwestern Farther Pomerania within five days. Cut off corps group Hans von Tettau retreated to Dievenow as a moving pocket until March 11. Thus, German-held central Farther Pomerania was cut off, and taken after the 