There is only one other time in U.S. history that a war was financed entirely through borrowing, without raising taxes: when the Colonies borrowed from France during the Revolutionary War.

Even if we were to leave Afghanistan and Iraq tomorrow, our war debt would continue to rise for decades. Future bills will include such things as caring for military veterans, replacing military equipment, rebuilding the armed forces and paying interest on all the money we have borrowed. And these costs won’t be insignificant.

History has shown that the cost of caring for military veterans peaks decades after a conflict. Already, half of the returning troops have been treated in Veterans Administration medical centers, and more than 600,000 have qualified to receive disability compensation. At this point, the bill for future medical and disability benefits is estimated at $600 billion to $900 billion, but the number will almost surely grow as hundreds of thousands of troops still deployed abroad return home.