The "fighting for our freedom" tagline is one that people often repeat without thinking. "Freedom"/"Bravery"/etc... have become bumper stickers more than anything else.
An honest look at our military history would shoot some holes through that logic...
List of wars involving the United States - Wikipedia
The War of 1812 was defending our nation...
Civil War preserved the union (though, was risky because it destabilized it and an opportunistic other country could've capitalized on that...we're lucky they didn't)
One may be able to make an argument that our involvement in the two world wars was a 'preemptive protection measure'
Everything else until until those were "wars", but could be more accurately described as land grabs and indiscriminate Indian slaughter.
...and like I made reference to in my prior post, I can't put my finger on any military action from 1950-2019 in which our freedoms and sovereignty were under any sort of threat. Just a lot of inserting ourselves into other countries' civil wars, forcefully facilitating regime changes in the name of "spreading democracy" to parts of the world 99% of us will never go to, and protecting trade routes for business interests.
I'd be willing to go as far as saying that there's a certain morality to a few of our engagements with regards defending allies against larger aggressors...but none of that measures up to the claim of "defending our freedom" that pro-military conservatives like to casually toss around.