Hitler and his army invaded the Rhineland. Hitler wanted the land that was taken from him after of the Treaty of Versilles.
Hitler takes over Austria. Germans welcomed Hitler and his troops. Jews were being humiliated and attacked.
Hitler signed an agreement for part of Czechoslovakia. The British Prime Minister didn't want war and was very unprepared. He did whatever Hitler wanted but later that year controlled all of Czechoslovakia.
Germany and Italy form an alliance. Everyone knew about their alliance but didn't find it threatening because it wasn't headline news in the newspaper.
Hitler signed an agreement with the Soviet Union so they couldn't go against each other. Later on, Hitler stabbed the Soviet Union in the back and invaded Russia.
Germany invaded Poland and the was the action that started WW2. Hitler thought everything was going to be ok because no one said anything about his other invasions.