He attracted the anger of the Soviet Union when he helped gather support for the defense of South Korea after it was invaded in 1950 and later worked to end the Soviet boycott of UN meetings , though his involvement has only little to do with the eventual return of the Soviet Union to the UN . He attracted the ire of the Soviet Union when he helped gather support for the defense of South Korea after it was invaded in 1950 and later worked to end the Soviet boycott of UN meetings , though his involvement had little to do with the eventual return of the Soviet Union to the UN .