Marco Rubio noted that the situation around the settlement of the Ukrainian conflict remained complicated ANKARA, May 15. /TASS/. The conflict between Russia and Ukraine cannot be solved militarily, US Secretary of State Marco Rubio said. "There is no military solution to the Russia-Ukraine conflict. This war is going to end not through a military solution, but through a diplomatic one," the top US diplomat said upon his arrival in Antalya for an informal meeting of NATO foreign ministers.