After peloponnesian war, which city state gained control of all greece for a short period of time

What enabled the drastic increase in us troop development to vietnam between 1964 and 1965?

What was the national government’s biggest concern if facing a war, under the articles of confederation? the national government had no national military. the country had grown too large to defend with a small army. the states would not back the federal government. there was no way the states would pay for fighting a war.

What from the columbian exchange had perhaps the biggest impact on the world?