What was the peninsula campaign and what was the outcome?

The Peninsula Campaign was a significant military operation during the American Civil War, taking place from March to July 1862. Led by Union General George B. McClellan, the campaign aimed to capture the Confederate capital of Richmond, Virginia, by advancing up the Virginia Peninsula between the York and James Rivers. Despite initial successes, the campaign ultimately resulted in a Confederate victory, with General Robert E. Lee's forces successfully halting McClellan's advance during the Seven Days Battles. This outcome led to a prolonged stalemate in the Eastern Theater of the war.