The 3rd Military Region, formed after the war in Cluj, changed its name to 3rd Army Command on 30 April 1960. During this time, the training of the officers and the band was made in the new concept of country defense and national military doctrine. Thousands of soldiers participated in the national economy, including the harvest. The army troops participated massively at removing the effects of the catastrophic floods of the 1970s and 1975s and the earthquake of 1977. The intervention of some Warsaw Pact states in Czechoslovakia (except Romania) and the invasion of this country in August 1968, led to profound changes in the structure of 3rd Army Command. At that time, there began the formation of the new 81st Mechanized Division (at Dej), the existing 11th and 18th Mechanized Divisions (from Oradea and Timișoara) were strengthened, as was the 6th Tank Division (from Târgu-Mureș). In the next year (1969), it was appreciated that the fighting capacity of the 3rd Army Command grew by over 75% from the point of view of the personnel, and with about 55% from the military equipment.