Russian forces in Syria came close to clashing with the United States and U.S.-backed forces in the western part of the country but fell back following a phone call between a top Russian general and the top-ranking U.S. military officer. The incident earlier this week, east of the Euphrates River in Syria’s Deir al-Zor province, came to light Tuesday when U.S. Defense Secretary Jim Mattis shared his concerns while talking with reporters. “These were forces moving into more advanced positions, too close,” Mattis said, calling them “Russian elements.” Discussions between the U.S. Chairman of the Joint Chiefs of Staff, Gen. Joseph Dunford, and his Russian counterpart, Gen. Valery Gerasimov, defused the situation. “Those (Russian) elements fell back,” Mattis said. “We have also drawn off slightly.” The close call between Russian and U.S. forces in the region follows a clash last month, when Syrian government forces, along with Russian mercenaries, attacked U.S. …