Can you tell me what happened in the Seven Days war? It is part of the Civil War. The Battle of Oak Grove and etc. Think that I am an 5 years old and explain it to me

Seven Days' Battles, (June 25-July 1, 1862), series of American Civil War battles in which a Confederate army under General Robert E. Lee drove back General George B. McClellan's Union forces and thwarted the Northern attempt to capture the Confederate capital of Richmond, Virginia.