My father worked on a AA gun crew. Their chief duties was to shoot down Buzz Bombs hitting London. They shot down something like 8 out of 10. The Brits were very pleased.
Dad passed away when I was 3 years old, but he kept all his Company newletters and paperwork. It was very interesting reading.
He was section chief for a battery of 105's that fired regularly at a mountain called "Ol' Papasan". This mountain was honeycombed with tunnels that the N.Koreans dug to get past our lines. Sometimes, they would fire for 48 hours straight; at night, the gun barrels would glow red.
Dad said that mountain was about 40 feet shorter when he left, and a lot of N.Koreans were killed there when the tunnels caved in on them....