Battle of Cirith Ungol
When Frodo Baggins was found unconscious on the Pass of Cirith Ungol by a small company of Orcs from Cirith Ungol and a large company of orcs from Minas Morgul. The Orcs took him to the tower to be questioned. And when they stripped him of is clothing, they found the Mithril Shirt, which Gorbag the leader of the Morgul-orc company, coveted it. Then Gorbag stabbed Shagrat the commander of the tower, in the arm, which lead to a battle between the two companies that didn't end till nearly all of the Orcs were dead. Samwise Gamgee arrived near the end of the battle to rescue Frodo, and killed an Orc named Snaga who was whipping his master.