What made germany’s invasions of europe difficult to stop during world war ii?

Germany's air attacks and fast-moving troops on the ground

Germany’s invasions were difficult to stop giving that they combined both ground troops which were supported by airstrikes. It is this military strength that made Hitler to launch attacks on other European nations such as Poland

salmon were fished in puget sound.

the fact that could also be added to column b is that during world war ii, specifically between the years 1941 and 1945, japan expanded its territory towards the indonesian territory in what was known later as part of the "pacific war". in that time, japan could conquer the philipines, singapore,   borneo, central java, malang, cebu, sumatra and various other islands of the area, therefore expanding its territory for a brief period of time.