Generally dynamic, General Dynamics is a prime military contractor to the Pentagon (the US government accounts for about 60% of sales). The company's military operations include information systems and technology (information technology and collection, as well as command control systems); marine systems (warships, commercial tankers, and nuclear submarines); and combat systems (battle tanks, wheeled combat/tactical vehicles, munitions, and rockets and gun systems). Its aerospace unit, which is composed of Gulfstream Aerospace and Jet Aviation designs, makes, and refurbishes business jets primarily for civilian customers.