Like the M1 Abrams main battle tank (MBT) and the Apache family of helicopters, the U.S.-made M60 tank proved that upgrades over time can keep a weapon system viable for decades.

Here’s What You Need to Remember: The M60 tank was originally based on the M48 Patton tank. During the Cold War, one U.S. Army main battle tank served longer and fought on more battlefields..