Courts don't have an army either. Only the executive has an army. Actually the president doesn't have an army. The generals have an army. You know we've never invented a system that stops the guys who have an army from taking over the guys who don't have an army, and we call it a coup d'etat, and it happens all over the world with some regularity. The best we can do is make sure the guys who have the army are guys who are committed to the wellbeing of the country.
> Courts don't have an army either. Only the executive has an army.
Exactly, that's the bug. Two of the three branches of government can only write sternly worded opinions on paper. Only one has the brute force to impose their will. So there really is only one branch of government in the US.