Curtiss civil and military aircraft were predominant in the interwar and World War II eras. Antisemitism reached its peak during the interwar period. Antisemitism in America reached its peak during the interwar period. As tensions in the interwar period escalated, the Stalinist PCA and PPA broke ties. There were 786,000 Germans in interwar Romania in 1939. Orthodox Christians also faced discrimination in interwar Poland. It was followed by a rise of dictatorships during the Interwar period. Development continued during the interwar period. During the interwar period, he advocated mobile armoured divisions. The Nogat formed part of the border between East Prussia and interwar Poland. During the interwar period, 29 observation squadrons were established. Different tank classifications emerged in the interwar period. The preeminent example of a planned community in interwar Poland is Gdynia. In the interwar period tanks underwent further mechanical development. Association football gained popularity in the interwar period.