The incorporation of Pomerania and a part of Western Kuyavia into Poland was sanctioned by the Treaty of Versailles. Contrary to Polish hopes for swift realization of its postulates, it was not ratified by Germany until 10 January 1920. Just a week later Polish troops arrived in Gniewkowo, Działdowo, and Golub (17 January), and Toruń, Brodnica, and Lidzbark (18 January). The takeover of civilian authority in the individual localities in the region was coordinated by local people’s councils and authorized general commissioners. The military authority was taken over by units of the Pomeranian Front, commanded by General Józef Haller, and the Greater Poland Front, commanded by General Józef Dowbor-Muśnicki.
In early February 1920 troops commanded by General Józef Haller entered Kashubia and seized the coast in the course of several days. On 10 February in Puck General Haller symbolically wedded Poland to the sea.