That would require a military arsenal. The EU outsourced that to the U.S. a long time ago.
Seriously, I'll grant the most advanced stuff is American but you really think everybody else only has sticks, stones, and water pistols?
Regardless, most EU nations do spend relatively little on their military compared to the U.S., hence the reliance.
Sorry to break it to you.
– Drax, Guardians of the Galaxy