The document summarizes key battles and events in the Eastern theater of the American Civil War between 1861-1862. It describes the First Battle of Bull Run in July 1861, where Confederate troops halted the Union advance. In November 1861, George McClellan took command of the Union army. The document then outlines several battles in Virginia in 1862, including the Seven Days Battle where Robert E. Lee forced McClellan to retreat from Richmond. It also discusses the bloody Battle of Antietam in Maryland in September 1862, which halted the Confederate invasion of the North. Finally, it briefly summarizes the naval war, including the famous duel between the C.S.S. Virginia and U.S.S. Monitor at Hampton Roads in