Complex sentence: This was only one of two direct military confrontations between the U.S. and the USSR in the history of these two countries, the other being the attack on the Sui-ho Dam taking place during the 1950-1953 Korean war.
Split into simpler sentences: This was only one of two direct military confrontations between the U.S. and the USSR in the history of these two countries. The other being the attack on the Sui-ho Dam taking place during the 1950-1953 Korean war.