Per the Geneva Convention, it is OK to lock them up without charges or shoot them on sight.
Remember, more than 1,000 U.S. citizens answered Hitler's call to fight for the Fatherland prior to WW2. Those Americans enlisted in the Wehrmacht and wound up fighting *against* U.S. military forces.
When they were captured, they were POW's and got no attorneys and had no charges filed against them.
Likewise, our military was not required to stop battles, offer attorneys, and give full due process of a trial to every group of NAZI's that might include an American citizen before we shot those SOB's.
And there was a third group. The NAZI's sent 8 former U.S. residents dressed as civilians back to the U.S. aboard two different U-Boats. One submarine landed the NAZI Americans in New England, the other landed them in Florida. Their missions were to blow up U.S. manufacturing plants and poison our water supplies.
But because they wore no recognized military uniform and carried no military ID's, they were subject to battlefield justice (i.e. any punishment desired by their captors - that would be us - up to and including being shot on sight). Thus, these "enemy combatants" were NOT entitled to the rights of legitimate, recognized POW's.
That they were given cursory military tribunals in FBI headquarters was frankly more than they were entitled to by treaty or law. The U.S. Supreme Court reviewed the military tribunals and declared them in compliance with all U.S. laws and international treaties.
This was more than half a century ago. So Bush didn't just invent the idea and treatment of enemy combatants, contrary to the filthy rubbish that you are attempting to spread.
If you don't like the Geneva Convention, then rail against it, fine. But don't try to lie and blame GW Bush as if Bush invented the whole concept of "enemy combatant" being different from recognized Prisoners of War (i.e. POW's).
That sort of dishonest partisan attack is typical of you Libertarians, who are also known to spread other falsehoods against Bush...