I would not expect the Dallas police to keep a rapid reaction force in Houston.
Houston, where I live, should take care of its own crime.
Yet, NATO is a treaty that analogously puts the DPD on Houston streets.
Let Houston deal with its own gang bangers.
Nice try. Not surprisingly, you ignored my analogy. My analogy specifically said you could NOT rely on or accept help from any outside source; that you would be on your own; which is what you alluded to in your original post vis-a-vis the former “bombed out” countries that would have to face aggression on their own.
So, don’t bring the Houston PD into the equation. Per your original premise, you are on your own.