The Battlefield 2 total conversion historical realism modification "Battlefield: Korea" deals with the Korean War (1950 - 1953), which is also known as the "Forgotten War".
The POMZ, POMZ-2 and POMZ-2M (ПОМЗ, ПОМЗ-2, ПОМЗ-2М) are
types of Soviet-made stake mounted anti-personnel fragmentation mines.
The POMZ mine was used during the Second World War. It was superseded by the POMZ-2, and later by the improved POMZ-2M. These mines (and copies thereof) have been used in numerous conflicts, including the Vietnam War and the Korean War.
This is what the Communist forces will use with the Engineer kits.