Troops from the United States and Ukraine have officially opened joint training exercises intended to help bolster Ukraine's defenses against incursions from Russian-backed separatists in the east.
Russia's War Against Ukraine
Associated Press: US, Ukraine start military training, defying Russian fury
Soldiers of the US Army's 3rd Squadron, 2nd Cavalry Regiment meet with local residents upon arrival during the \"Dragoon Ride\" exercise in Vilnius on March 22, 2015.
