City Destroyer

City Destroyers are city size battleships that are the Harvester's primary force. They are used to wipe out most of the planet's cities before the aliens start their invasion. They are about 25-miles in diameter. They have their own defense shield, in which the inhabitants weapons can't penetrate their ship. They have a primary energy cannon that the aliens use to fire their weapon. About 82 destroyers are stored in a colony mothership and are deployed when they arrive at their targeted planet. Usually in the fleet, their is one destroyer that is designed to land and drill into the planet's core. During the War of 1996, humans of the planet Earth were able to deactivate their shield and were able to take out the destroyers before obliterating their mothership. One mothership was deactivated after the mothership's destruction before be reactivated 20 years later in 2016 due to the return of the aliens.

War of 1996
On July 2nd, 1996, after arriving at the planet Earth, 82 City Destroyers were launched from their mothership and started descending into the planet's atmosphere. Each City Destroyer was primarily placed over a city (mostly capitals or major cities) and used human's satellites for the coordinated attack. This code was discovered by MIT Technician David Levinson who warned the President of the United States Thomas Whitmore about this. At 7:30pm, each City Destroyer simultaneously fired their cannons upon the cities, obliterating most of the cities and killing billions of people. On July 3rd, most countries launched their own counterattack, but due to the Destroyer's defense shield it became a one side battle. After the City Destroyers moved to their next targets.