World’s militaries in joint-military exercises together for DECADES.
The member states of NATO military training together: Albania, Belgium, Bulgaria, Canada, Croatia, Czech Republic, Denmark, Estonia, France, Germany, Greece, Hungary, Iceland, Italy, Latvia, Lithuania, Luxembourg, Montenegro, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Turkey, United Kingdom, United States.
63 pages of joint-military exercises involving the United States -- WIKI
U.S. and China carry out joint military drills
US and Russian troops train together
Russia and China in Military Exercise
Chinese Military Joining Russians for Nuclear War Games -- FB
American Soldiers in Russian Military Parade
Russia, China exercises -- NEWSWEEK
Americans and Russians against Somali pirates 2018