who led the failed American attack on Quebec?

Answer 1

The Battle of Quebec was an attempt on December 31, 1775 by American revolutionaries to capture the Canadian city of Quebec ... Benedict Arnold and Richard Montgomery were the two primary American commanders in the assault, which failed.
Brigadier General Montgomery came up via Lake Champlain; General Benedict Arnold took his armies through the backcountry of Maine.
The attack began at 4:00 am on New Year's Eve, December 31, 1775. Arnold divided his army into two attack columns. He would lead his own group, totalling 600 men, ...while a second column, totaling 300 men led by Montgomery, would attack the southern part of the city.

Answer 2

The attack was led by Brigadier General Richard Montgomery, and by Benedict Arnold. Montgomery was killed in the battle, while Arnold was wounded.

Answer 3

Ethan Allen