 With the advent of weapons of mass destruction that could decide a war by themselves, strategies shifted away from a focus on the application of conventional weaponry to a greater focus on espionage and intelligence assessment, especially after the exposure of the Atomic spies.The difference between tactics, strategy and grand strategy began to melt during the Cold War as command and communication technologies improved to a greater extent, in first world armed forces.The third world armed forces controlled by the two superpowers found that grand strategy, strategy and tactics, if anything, moved further apart as the command of the armies fell under the control of super power leaders.