As to the old Prussians - they had different choices durring history
The Lizard Union or Lizard League (German: Eidechsenbund; Polish: Związek Jaszczurczy) was an organization of Prussian nobles and knights established in Culmerland (Chełmno Land) in 1397. Its declared goal was to combat lawlessness, although it discreetly sought the transfer of Culmerland from the Teutonic Knights to Poland.
The union was founded by Nicholas von Renys, John of Pulkow, Frederick of Kitnow, and Nicholas of Kitnow. It was named after its emblem, a lizard (eyne eydechse), and expanded its influence to other provinces. During the Battle of Grunwald in 1410, Nicholas von Renys carried the banner of the Culmerland troops for the Teutonic Order. He lowered the banner prematurely, which was considered a signal for retreat that contributed to the defeat of the Knights.
The Prussian Confederation (German: Preußischer Bund or Bund vor Gewalt; Polish: Związek Pruski) was an organization formed in 1440 by a group of 53 gentry and clergy and 19 cities in Prussia to oppose the monastic state of the Teutonic Knights.