In West Prussia, King Frederick William III was making it difficult for Mennonites to acquire land, because of their refusal to serve in the military due to their pacifist religious beliefs. Another reason to immigrate was fear of the changes brought about by the French Revolution.
King Frederick William III of Prussia made it challenging for Mennonites to obtain land in West Prussia, as they refused to participate in military service due to their pacifist faith. Additionally, many Mennonites left because of anxieties surrounding the French Revolution's impact on society.