Following the establishment of diplomatic ties, and after the Cuban Missile Crisis in 1962, Cuba became increasingly dependent on Soviet markets and military and economic aid. Cuba was able to build a large military force with the help of Soviet equipment and military advisers, but as the years passed, Cuba's economy began to decline as a result on mismanagement of the economy and low productivity, which was further aggravated by the U.S. embargo. Despite this, the Soviets also kept in close touch with Havana, sharing varying close relations until the collapse of the bloc in 1990.