A strong national defense means defending the United States and only the United States.
If we go to war, we should declare it, fight it and win it. Declaring war creates a plan and an objective. We’ve lost or are still fighting the vast majority of wars we’ve failed to declare. When you win a war, there is no enemy and you need no occupying force for the long term.
Fighting terrorism means targeting only terrorists, not nation building.
National defense does not include policing the world and managing the affairs of other nations. Doing so means over extending our military, intervening in cultures we don’t understand and creating enemies we don’t need. Ultimately, it’s a barrier to promoting the freedom we claim to support.