Which country did North Korea invade in June 1950?

all together there were 21 countries from the United nations involved in the Korean war . Britain suffered some 1100 kia . The answer omits this and gives the impression that only the USA were there.

my late Father served during that war.

I've not been to South Korean

Pah, Non-South Korean troops were overwhelming from the USA with over 300.000 compared to about 50.000 others.

Bigkev, my late father served during that war.

yeah it's called the Korean war