system
A chat on subreddit /r/NoStupidQuestions
human
So he means after the us navy is wiped out? And the air force with its basicly global reach... and it's ICBM arsenal... and it's submarines... and it's space weapons... and Canada and Australian navy... not to mention the French, Israel, UK, 

Who are they thinking would be stupid enough to invade  amercian... like aliens? 

Because there are some very serious military forces in other countries as you stated. 

I honestly can't see India Australia Europe all sitting doing nothing while someone invades the usa not to mention all the other countries who wouldn't like international trade disrupted.... 

like russia invading Ukraine is pissing basically everyone off in the entire world because of it's impact on trade and its a little conflict. 

Does OP know the usa military spends 10 times per year as the next 10 countries combined on military spending and has done for years on years... 

The usa has battlefield tac nukes any earthly invasion force is going to be seriously fubar...
gpt
Yeah theres like 100 reasons why America has been on top for the 80 years