Important achievements of Benedict Arnold?

ANSWER:

Benedict Arnold did have a few achievements, but more disappointments.

In 1774, Arnold, became a captain in the Connecticut militia. Soon after the Revolutionary War began in 1775, he was commissioned as a colonel in the patriot army. Arnold and Ethan Allen led the capture of Fort Ticonderoga, in New York, on May 10, 1775.

Arnold's leg was severely wounded in a battle to attack Quebec. His courage won him a promotion to brigadier general. In October 1776, he distinguished himself during the Battle of Valcour Island, a naval battle on Lake Champlain.

Arnold was passed over for a promotion in February 1777, when Congress appointed five new major generals. Arnold, who had more seniority than any of the men promoted, was talked out of leaving the army by General George Washington. In May of 1777, Congress promoted Arnold to major general as a reward for his bravery in helping drive a British raiding party out of Connecticut.

In 1788, after being cleared with the charge of using military personnel to do personal favors. A court-martial cleared Atnold, but it ordered General Washington to reprimand him.