Complex sentence: On June 23,1968, parachute troops of the 108th Airborne Regiment were tasked to fly from Kaunas to Ryazan, where they were to demonstrate their vehicle assault landing skills to the Minister of Defence of the USSR, A.A. Grechko.
Split into simpler sentences: On June 23,1968, a parachute company of the 108th Airborne Regiment was tasked to fly from Kaunas to Ryazan. In Ryazan the company staff was planned to demonstrate its vehicle assault landing skills to the Minister of Defence of the USSR A.A. Grechko.