Red Storm Rising by Tom Clancy:

"Red Storm Rising is a war novel, written by Tom Clancy and co-written with Larry Bond, and released on August 7, 1986. Set in the mid-1980s, it features a Third World War between the North Atlantic Treaty Organization and Warsaw Pact forces, and is unique for depicting the conflict as being fought exclusively with conventional weapons, rather than escalating to the use of weapons of mass destruction or nuclear warfare."

Well I hope it doesn't escalate to WW III!