He also noted that as a member of the Western NATO military alliance, Poland is now protected by a creed that says an attack on one is an attack on all.

VOA: standard.2009.09.01

This is in a state that barely extends beyond Brandenburg and Pomerania in what now is Western Poland, and still Prussia in the unified Germany.

当时的普鲁士基本上就是勃兰登堡和波美拉尼亚,在德意志第二帝国时期仍保留普鲁士王国的建制,历史上的波美拉尼亚现位于波兰西部

耶鲁公开课 - 欧洲文明课程节选