Lee is most notorious for his actions during the Battle of Monmouth. Washington needed a secondary commander to lead the frontal assault. He unwillingly chose to put Lee in charge as he was the most senior of his generals. Washington ordered him to attack the retreating enemy, but instead, Lee ordered a retreat. He retreated directly into Washington and his troops, who were advancing, and Washington dressed him down publicly. Lee responded with "inappropriate language" (insubordination), was arrested, and shortly thereafter court-martialed. Lee was found guilty, and he was relieved of command for a period of one year.