The answer to your question is YES. There are two reasons why that is: the Viet Nam War and the 26th Amendment to the Constitution, which lowered the voting age from 21 to 18 in 1971. This allowed 18 year olds to enter into legal contracts without parental consent.
tank. 1. a large container or structure for holding a liquid or gas. 2. an armored combat vehicle, moving on caterpillar treads and usu. armed with a cannon mounted inside a rotating turret. 3. a prison cell for more than one occupant, esp. for groups of new prisoners. 4. a natural or artificial pond, esp. for storing water.
Tank Platoon. The tank platoon is the smallest maneuver element within a tank company. Organized to fight as a unified element, the platoon consists of four main battle tanks organized into two sections, with two tanks in each section. Tank platoons usually operate as a whole or by section and do not normally deploy individual tanks.