What actions did the leader of Germany take that eventually led to war

WW1: The leaders of Germany decided that because their economy was suffering greatly from the Great Depression (for context about a barrel of German money would barely be enough for some bread) so they thought that if they could conquer parts of Europe they could benefit financially. They also felt that they needed to show Britain their power as both countries were secretly building massive navies at the time and those would be put on show at the battle of the Jutland.

WWII: Hitler the German nationalists leader was a diehard patriot for Germany and wanted revenge because of the outcome of WWI. He also became extremely greedy and pushed the French and British a lot to get what he wanted. (This is still before the war) For example the whole Czechoslovakia incident (a long story, basically the allies said to Hitler that he could have some of Czechoslovakia but not all of it and he said ok but then went back on his word and invaded the rest of Czechoslovakia) Germany was also once again in great economical crisis as the price the allies charged Germany at the end of WWI was enormous. Hitler was also a major racist and The Night of the Broken Glass along with the Holocaust didn't go over so well with the US, France, and Britain.