Pro-Russian separatists carry an ammunition part in Donetsk The resignation of Igor Girkin, the Russian military mastermind behind the takeover of large parts of eastern Ukraine by rebel fighters, this week was the latest crack to appear at the top of the months-long rebellion that has become increasingly strained. His departure is the third high-profile change in the rebel hierarchy in the past week. Alexander Borodai, also a Muscovite, stepped down last week as prime minister of the self-declared Donetsk People’s Republic. With Mr Girkin, he was part of Russian-backed separatist forces in Moldova’s breakaway region of Transnistria in the early 1990s. More On this story On this topic IN Europe The replacement of both with Ukrainians marks a transition in the leadership from highly trained Russian military officers to locally recruited warlords in an increasingly tense stand-off with Ukrainian forces . “It will be like Stalingrad,” an armed […]