My father was too young for WWII, but served in Korea. He volunteered at 17, and was assigned to the Second Armored Division. He went to Korea as a corporal driving an M4 Sherman. He never spoke of his service there, and I have tried to trace his unit(s) throughout the war, and found it to be nearly impossible. I have been told that this is common in Korea, because besides being a disorganized, ad hoc defense at first, many American units were so badly decimated that they essentially ceased to exist, and any survivors were simply rolled into other units. He ended his time there as a Senior Staff Sergeant, in command of four M4 Shermans. I can only assume there were some battlefield promotions involved.
What little I know of his service was mostly provided by my uncle, my dad's oldest brother, who also served in Korea, in the infantry.
When I was about 14, I was allowed to sit in with "the men" at a family reunion. Present were my father and his (4) brothers, and my grandfather, (2) of my elder cousins, and me. They were all very quiet & articulate, discussing US politics, the economy, hunting, and the like. After a lull, my dad's oldest brother (who also served in Korea) asked my dad to "Tell the story".
This was such a special moment for me, I have strived to remember it word for word.
My dad started slowly, explaining that his four tanks were deployed one one side of a river, with orders not to cross the river under any circumstances.
Allow me to digress for a moment, and explain that virtually all tank commanders want to go one-on-one with an enemy tank. It is said Patton and Rommel both separately made the statement that they would love to fight each other in single tank combat, to decide the outcome of the war.
Back to the "incident".
They had been there for days with nothing to do, and had serviced all their equipment twice, and it was very boring duty. They had seen no action for weeks. It was also very hot, and everyone was so bored that they were all sleeping or dozing.
Dad was sitting inside the tank, dozing, while resting his forehead against the padded main gun sight. He doesn't know why he woke up, but when he did, the saw that he crosshairs were centered on a Chinese T-34 just creeping up over the hill on the other side of the river. Not believing his luck, he he stomped the firing button to kill the T-34, but nothing happened. Realizing the gun wasn't loaded, he kicked the loader in the head and screamed "AP, Load!". The loader, confused, waking from a dead sleep, grabbed a round, slammed it in the chamber, and closed the breach. The gun fired, and my dad made a textbook hit just below the gun mantlet of the T-34.... with a smoke round!
Again he yelled "AP, Load!" and stomped the firing button. Again, nothing happened! Again, he kicked the loader in the head and screamed "AP, Load!". He stomped the button again, and the gun fired, but by now the T-34 was backing away as fast as it could. Dad got on the radio, and all four tanks began shelling the back slope of the hill.
What my dad hadn't realized in the heat & excitement of the moment, is that the loader who loaded the smoke round by mistake, was in great pain. You see, because my dad had already stomped the "fire" button, the gun fired as soon as the breach closed. An interesting feature of the M4E5 is that the gun recoils back within 3/4" of the radio face at the back of the turret, smashing the guy's hand into the radio face. While he was nursing that injured hand, (instead of loading the next shell) dad stomped the button again, so when he loaded the next shell, (you guessed it) the gun fired as soon as the breach closed, and he got his hand smashed a second time. By now, the assistant driver has seen the loader's distress, and took over for him. He didn't want his hand smashed, so he threw the breaker for the gun power, loaded, and threw the breaker again. Then the firing went on as it should.
They would never let them cross the river, so he never found out if he got the chinese tank or not.
The loader's injuries turned out to be painful, but not serious. Dad thought the guy wold hate him, but it turned out to be an injury sustained in battle, so he was strangely happy about it, because he got a Purple Heart.
After Korea, we asked dad what he did here in the states to finish his enlistment. All he would say was "weapons testing." We all assumed tank testing, because tanks were his life. We now believe he was one of those troops they sent to Nevada, dropped in a trench, and cranked a nuke off in front of them. He never admitted it. If my dad had signed a secrecy agreement, God himself couldn't make him break it. He developed a thyroid tumor in his mid 30s, and then died of leukemia 3 days after his 41st birthday.
Edit:
I forgot mention that a shot just below the gun mantlet of a T-34 with a 76mm High Velocity AP round head-on at anything less that 1000yds in a virtual guaranteed kill. The T-34s main advantage was it's sloped armor. (revolutionary for it's time) This caused a lot of hits to just glance off. Just below the mantlet there is no place for the round to go, except into the crew compartment. With internal shell stowage....