 Complete the following phrase:  The 247th Guards Air Assault Regiment is a regiment of the Russian Airborne Troops, currently part of the 7th Guards Mountain Air Assault Division. It was first formed in 1973 as the 21st Air Assault Brigade and was transferred to the Soviet Airborne Troops in 1990, becoming the 21st Airborne Brigade. The brigade was renamed the 247th Air Assault Regiment in 1998. In 1998, it also gained the title Caucasian Cossack, although it is not all composed of Cossacks. In 2013 it became a Guards regiment. The unit fought in the First Chechen War, the 