Russian military aviation has undergone several upheavals in the
post-Soviet era. There have been two driving forces behind these
changes. First, the Russian experience of air power in conflicts has led
to an increasing integration of the various branches of the armed
forces. Today's VKS was created as a result of the absorption of the Air
Defence Troops (VPVO) by the Air Force (VVS) in 1998, and then a merger
of the Air Force with the Aerospace Defence Troops (VVKO) in 2015.