KYIV, Ukraine (AP) — The Ukrainian military says it has repelled more than a dozen Russian attacks in the country’s east and north, including attempts to advance on key cities in the eastern industrial heartland known as the Donbas. In its regular Facebook update, the military’s General Staff said Monday that Russian troops had attempted to push towards Kramatorsk, one of two major cities in the eastern Donetsk province that remain under Ukrainian control, but they failed “completely and chaotically” and retreated. The Donetsk region is one of two provinces that make up the Donbas, where the fighting has largely been focused in recent months, since Kremlin forces retreated from around the capital, Kyiv.