Both NATO and the EU want to spend a €100 billion on defense — and that’s leading to clashes between the two Brussels-based institutions.

The European Union is donning its camouflage pants and flexing its muscles on defense. NATO isn’t happy.

For years, the two Brussels-based institutions have barely communicated when it comes to defense, except for some military cooperation in areas like the Balkans — because they haven’t had to. Defense was NATO’s turf (it is a military alliance, after all), while the EU dealt with trade, farming, climate change and things like standards for heritage cheeses.

It was summed up by a catchphrase popular in military circles: “The U.S. fights, the U.N feeds, the EU funds.”

That’s now changing.