"We have to look at the vision of one day creating a real, true European army"--Angela Merkel, 2018
Not only was Europe united in 1943, but it even had a true European army. The Waffen-Schutzstaffel or Waffen-SS (Armed Guard Unit), the Nazi Party's army, fielded units from every country in Europe.
Macron is just upset because he grew up in a France that didn’t allow him to wear one of those cool Nazi uniforms.