Complete the following sentence: Thus, Nixon (or his successor Gerald Ford) was unable to fulfill his promises to Thieu. <unk> <unk> <unk> With the U.S. no longer heavily involved, both the U.S. and the Soviet Union no longer saw the war as significant to their relations. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️
️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️