It allowed women to vote when they couldn't before.
In 1765 the oppresive british government levied their first tax against american people the stamp act was notoriously unfair not only did it demand more then most people were able to afford it but it was also levied by a government where the american people had no presentation
Carter wanted to drop the atomic bomb on China when North Korea tried taking over the south of Korea. The u.S got involved in the war and pushed North Korea all the way to China
I would say almost half. Germany itself was pretty big, and it controlled Austria, Denmark, Norway and Northern parts of France- so my estimate would be around 40%