Poland's Wedding to the Sea was a ceremony meant t‌o symbolize restored Polish access to the Baltic Sea that was lost in 1793 by the Partitions of Poland. It was first performed on 10 February 1920 by General Józef Haller at Puck. In the early spring of 1945, following the Polish-Soviet advance into Pomerania, a number of such ceremonies took place in several locations. The most famous 1945 Weddings to the Sea were performed by the soldiers of the Polish Army on 17 March 1945 in Mrzeżyno (Deep), and on 18 March in the newly-captured port of Kołobrzeg (Kolberg).

Józef Haller von Hallenburg was a lieutenant general of the Polish Army, a legionary in the Polish Legions, harcmistrz, the president of the Polish Scouting and Guiding Association (ZHP), and a political and social activist. He was the cousin of Stanisław Haller.