I did a little dig on Defender Europe 2020 and SHAEF. After it was pointed out here in the notables that both use the same symbol.

The burning sword of Archangel Michael.

Now I found something that supports the thesis that Defender2020 is about Germany.

Who do you think is the patron saint of the Germans and all German speaking people?

Archangel Michael

Sauce: https://en.wikipedia.org/wiki/Michael_(archangel)