As a military leader, george mcclellan was known for

1. creating the anaconda plan.
2. fighting in the war of 1812.
3. training soldiers how to fight.
4. acting quickly at fort sumter.

4. Acting quickly at Fort Sumter

Explanation:

McClellan was the general who organized the Army of Potomac in 1861

by 1890, the united states had by far the world's most productive economy. american industry produced twice as much as its closest competitor--britain. but the united states was not a great military or diplomatic power. its army numbered less than 30,000 troops, and its navy had only about 10,000 seamen. britain's army was five times the size of its american counterpart, and its navy was ten times bigger. the united states' military was small because the country was situated between two large oceans and was surrounded by weak or friendly nations. it faced no serious military threats and had little interest in asserting military power overseas.