German officer to serve as U.S. Army Europe's chief of staff

[CaféAuLait]

German officer to serve as U.S. Army Europe's chief of staff

KAISERSLAUTERN, Germany — For the first time since U.S. troops arrived in Europe during World War II, a German general will serve as chief of staff of U.S. Army Europe.

German officer to serve as U.S. Army Europe's chief of staff | Army Times | armytimes.com

In historic first, German army general appointed USAREUR chief of staff - Army - Stripes


So, does he take the oath swearing to preserve, protect and defend the constitution of the United States of America and Germany? How the heck does this work?