The M60 Patton incorporated a British-designed 105mm gun as its main gun and was thus able to destroy any known enemy tank – a sharp answer to the woes of the M4 Sherman's 75mm gun against the armor of Nazi German Tigers during WWII.
Originally built by Hughes Helicopters (now known as MD Helicopters) and currently manufactured by Boeing, the AH-64 Apache helicopter made her maiden flight in September 1975 but didn’t actually enter into operational status with the U.S. Army until April 1986. She was worth the wait.