US–Soviet Joint Commission
The US and the Soviet Union met twice to form a provisional government but could not agree on which groups to consult, and the talks broke down.

미군정청 · Public domain · Source
The first Joint Commission opened in March 1946 at Seokjojeon in Deoksugung. The Soviets wanted to consult only groups that supported the Moscow decision; the Americans insisted anti-trusteeship groups be included, and in May the talks adjourned indefinitely. During the break, in June 1946, Syngman Rhee said at Jeongeup that "a provisional government or committee should be organized, even if only in the south" (the Jeongeup speech).
The second commission met in May 1947 but broke down over the same issue, and the US referred the Korean question to the United Nations.