Why would the order backlogs disappear? The only way for backlogs to disappear would be an increase in manufacturing capacity or cancellation of orders. I'm not so sure that we would want the backlog to disappear.
What it means is that the Founding Fathers realized that the new nation needed a regulated military to defend itself. Having just won an armed rebellion against the king's troops, they realized that the average citizens needed the right to keep and bear arms as a deterrent against this regulated military being used against them by some unscrupulous leader in the future.