general dynamics corporation (gd) is an american aerospace and defense multinational corporation. they were created by mergers and divestitures. as of 2019, it was the fifth-largest defense contractor in the united states, and the sixth-largest in the world, by sales. the company is number 92 in the 2019 fortune 500 list of the biggest united states corporations by total revenue. it is headquartered in west falls church, fairfax county, virginia.