America should withdraw the troops from other countries.

Put your army in other people's country is not a good way to safeguarding world peace, it will make people fear and try to resist. if a country has a problem, this is their thing, not your business, it should be solved by themselves. Also put you army in other people's country may create a war. for example: China and Japan always have territorial dispute, America has the troop in Japan, if China and Japan will have a war, it will influences the relationship between China and America, they may will join the war too. Also, if America put his army all around the world, we can not say the country call The United States, it should call The United Empire of Earth.