The Franco-Soviet Treaty of Mutual Assistance was a bilateral treaty between France and the Soviet Union with the aim of enveloping Nazi Germany in 1935 to reduce the threat from Central Europe. It was pursued by Maxim Litvinov, the Soviet foreign minister,[1] and Louis Barthou, the French foreign minister, who was assassinated in October 1934, before negotiations had been finished.
His successor, Pierre Laval, was sceptical of the desirability and of the value of an alliance with the Soviet Union. However, after the declaration of German rearmament in March 1935, the French government forced the reluctant foreign minister to complete the arrangements with Moscow that Barthou had begun.