Hitler came to power, and took Germany out of the League of Nations. He wanted to increase Germany's armed forces, because of this thousand of unemployed people were drafted into the army, and also this reduced one of the most important problems from Germany, the unemployment.
Tried to take over Austria but was stopped by Mussolini.
Hitler openly presented a massive military rally, celebrating the armed forces.
He broke the rules of the Treaty of Versailles, reintroducing conscription to the army. Anyway, he got away with rearmament. He also sent troops into the Rhineland, and made an anti-Communist alliance with Japan.
Tried out Germany's new weapons in the Spanish Civil War; made an anti-Communist alliance with Italy.
Hitler took over Austria; took over the Sudetenland area of Czechoslovakia.
He invaded the rest of Czechoslovakia; and also invaded Poland. This led him and Germany to a war.