Defense strategy is ultimately about making choices, which in peacetime often manifest themselves as decisions about the defense budget. As the budget gets squeezed, these choices become more difficult, and the current strategy may have to be modified or even abandoned. Yet without resource constraints, strategy would be unnecessary — the military could simply throw more money at all its problems. Limited resources thus create the need for strategy, and as resources become more constrained, strategy becomes more important. The key strategic choice facing the Pentagon now is one of timing: whether to prioritize today’s military or tomorrow’s. Given the budget drawdown currently under way, the Pentagon cannot afford to do both — it cannot get everything it wants.