Unfortunately, in a modern war, we will not have that much time to rebuild a military that can fight effectively. When Obama is finished, he will have left the US open to conquest or destruction which fits nicely with his plan to advance Islam’s conquest over the West, especially Jews and Christians.
That is not how wars of annihilation work. Everyone thinks they will be short, but they last for a long time.
Look at Syria, the Syrian Army has been reduced to creating rockets- out of sewer pipe or 55 gal drums rolled out of helicopters. Yet the killing goes on.