The Operational manoeuvre group (OMG) was a Soviet Army organisational maneuver warfare concept created during the early 1950s to replace the Cavalry mechanized group which performed the deep operations on the Eastern Front during the Second World War. The deep operations theory developed in cooperation between the Red Army and Wehrmacht theorists in the 1930s later influenced the Blitzkrieg operations and echelon-based doctrine. At the Front level an Operational Manoeuvre Group could include two tank divisions and three to five motor-rifle divisions.