The Battle of Monkton was an improtant battle in the Baltimore Campaign. The Federation sent a smaller force for a deceptive invasion. Meanwhile, they sent another force to invade from Western Maryland, and that force would be led by Ulysses S. Grant. McClellan was told to retreat from the first major confrontation no matter what, but after a day or two of fighting. Their goal, however, was not to advance, but to create tactical difficulties for Robert E. Lee's Army. This was done mainly through artillery fire and aggressive tactics.