Read this quote by George Kennan from the July 1947 edition of Foreign Affairs. The main element of any United States policy toward the Soviet Union must be that of a long-term, patient but firm and vigilant containment of Russian expansive tendencies. How did the United States implement this policy of containment? Responses by landing a large military force in China by landing a large military force in China by forming an alliance with the Soviet Union by forming an alliance with the Soviet Union by sending aid to noncommunist countries by sending aid to noncommunist countries by aiding rebel groups within the Soviet Union