Soviet involvement would be a secret until well after the end of the Cold War.

Later investigations into the circumstances of his death uncovered a trail of Soviet involvement.

The degree of Soviet involvement and any plans entertained by the Soviets are still subject to interpretation.

Has the Soviet involvement there caused morale problems in the military?

No one has ever surfaced admitting Soviet involvement.

Sweden was also a harsh critic of the Soviet involvement in Afghanistan.

But the end of the Soviet involvement brought an uneasy lull in the conflict.

The estimate was eventually rewritten to give more prominence to the possibility of Soviet involvement.

He raised alarm about Soviet involvement, and spoke to the need for Yugoslav unity.

Nonetheless, the Vietnamese are disatisfied with Soviet involvement in their country.