Troop Formation Ukraine service members stand in formation for the opening ceremony of the Rapid Trident exercise at the International Peacekeeping and Security Centre in Yavoriv, Ukraine, Sept. 3, 2018. Rapid Trident is a Ukrainian-led exercise with multinational support comprising 14 allied and partner nations. SHARE: Download: Full Size (0.96 MB) Credit: Army National Guard Pfc. Andrea Torres VIRIN: 180903-Z-GE975-0013R.JPG Photo Gallery