Complex sentence: The Parade commander was the head of the Moscow Garrison Colonel General Vladimir Govorov in his first parade and taking the salute was the Defense Minister Andrei Grechko in his 6th parade.
Split into simpler sentences: The Parade commander was the head of the Moscow Garrison Colonel General Vladimir Govorov in his first parade. Taking the salute was the Defense Minister Andrei Grechko in his 6th parade.