In 1925, Germany broke its diplomatic isolation and took part in the Locarno Treaties with France and Belgium, undertaking not to attack them. The Soviet Union saw western détente as potentially deepening its own political isolation in Europe, in particular by diminishing Soviet-German relationships. As Germany became less dependent on the Soviet Union, it became more unwilling to tolerate subversive Comintern interference:[1] in 1925, several members of Rote Hilfe, a Communist Party organization, were tried for treason in Leipzig in what was known as the Cheka Trial.