In summer time of 1863, the Confederate military led by Lee played for keeps by giving a large contingent towards the North, as much as Pennsylvania. It clashed aided by the Union army at Gettysburg, where in actuality the biggest battle ever become fought on United states soil occurred. After three days of desperate struggle, the Confederates must admit their beat. At Gettysburg, the Potomac army Union artillery contributed to retain the Confederate advance, impacting the outcome of this battle.
