The Battle of Skopje took place in 2547 on the inner colony of Skopje. During the battle, Orbital Drop Shock Troopers were sent to protect the headquarters of a shipbuilding corporation during the evacuation of their shipyards, under the justification that the machines, tools, and personnel that could be saved would be relocated to Reach to continue building parts for the war effort. As such, the ODSTs were told that they had to hold the perimeter at at all costs. The Covenant deployed Unggoy against the humans in waves, then followed these waves with Kig-Yar Snipers, then Jiralhanae shock troops, and finally Sangheili. The Covenant's sheer numbers and military strategy proved effective against the ODSTs.