Ukrainian government forces on Wednesday warned separatists in the eastern town of Donetsk that a plan was now in place to take back the territory they occupy, but defiant rebels reported a steady flow of new recruits who were ready to fight. The Ukrainian military pushed the rebels out of their best-fortified stronghold in the town of Slaviansk on Saturday, but they have regrouped for a stand in Donetsk, a city of nearly a million people. Rebels also still control strategic buildings in Luhansk near the Russian border. Separatists said on Tuesday that Igor Strelkov, a Russian military officer from Moscow who until the weekend led rebels in Slaviansk, had assumed command of the "defense of Donetsk". President Petro Poroshenko has ruled out using air strikes and artillery that might endanger civilians and said on Tuesday night: "There will be no street fighting in Donetsk." But the government says it has a plan to retake Donetsk and Luhansk and deliver a "