[Worldtraveler once upon a time]

--- "How many countries have we invaded? Irrelevant and stupid question."

And yet a question, nevertheless.

Consider this irrelevancy:

List of wars: 2003 to the present

And this somewhat outdated 2016 gem:

The US is now involved in 134 wars or none, depending on your definition of 'war'

And yet more irrelevancy:

US has spent $6.4 trillion on wars in Middle East, Asia since 2001

And, since we had an "Obama" above, here's a different view:

Global War on Terror

And what is totally irrelevant and stupid:

US Debt Clock

[adorno]

Still..

Irrelevant and stupid question... in regards to the question or matter/issue being discussed.

We don’t invade countries, but if we do enter any country, it’s a defensive move. Invasions and defense are two different things, but, your original question is still irrelevant and stupid.