The first attack in ww.2 was made by the Germans against the Josh's who lived in Berlin but this attack was only the beginning of the war the second attack was issued by Japan against the Chinese solder's in 1939 they Japanese officers ordered to excute all the Chinese prisoners and burn them alive
Blitzkrieg "The Nazis' aggressive attack on Poland was called Blitzkrieg (lightning war)".
The first aggressive movement of WWI was the assassination of Franz Fredinand. By the assassin organization the Black Hand.
Poland
1939
Poland.
When Japan became aggressive in the years leading up to World War II, America followed a policy of isolationism at first. However, after Japan's attack on Pearl Harbor in 1941, the US entered the war and adopted a policy of total war against Japan, seeking to defeat them completely.
Tokyo
Poland
Poland attack by Nazi.China Attack by Imperial Japanese Army.Ethiopia attack by Italy
The first attack which was at the start of the war was when Nazi Germany and the Soviet Union invaded Poland. World War 2 began in 1939. This caused the war after a couple of years of building up tension between the allies and the Nazis.
Bangladesh
Both Rome and Carthage adopted aggressive stances.