Before revision: Thus, no two nuclear powers have yet fought a conventional war directly except for two brief skirmishes between China and Russia in the 1969 Sino-Soviet conflict and between India and Pakistan in the 1999 Kargil War.
After revision: Thus, no two nuclear powers have yet fought a conventional war directly except for two brief skirmishes between China and Soviet Union in the 1969 Sino-Soviet conflict and between India and Pakistan in the 1999 Kargil War.