Campeign Economics

I was wondering if anyone has any records of how much of the economy
(proportion) was devoted to defense during the following times:
A. Peace
B. Cold-War
C. War.

	This would be used to determine the levels at which a campeign
would
start.	For example, if everyone knew trouble was on the horizon, then
they
would have forces that they could support for a cold war, then get more
money devoted to a hot war, but would now be buying green troops etc.