"Despite the allure of grand maneuver and decisive battles, a stubborn fact remains: Nation state-warfare is mostly an exercise in national attrition. The nation that can mobilize its forces and better bring them to bear on the enemy over time, usually prevails. It has been true since the Peloponnesian Wars, through both world wars, and it will continue to be true for future wars. This sobering reality dictates a strategic imperative: The Army must be prepared to quickly mobilize large numbers of units in a short period of time, get them across the Atlantic or Pacific, and get them into the fight. The fact that over 50 percent of the Army currently resides in the reserve component makes this all the more urgent. Yet the Army, with budget pressures and 16 years of mostly predictable deployment schedules, has actually seen this capacity diminished."