Islamic State militants have scored their most significant advances in the province of Aleppo, the closest they have come to Syria’s former commercial capital in two years, as it becomes increasingly clear that they are taking advantage of Russian airstrikes against the rest of the opposition to march into new territory.
As Russian planes continued to pound rebel forces in western Aleppo and other frontlines in the country, many of the opposition fighters who ousted Isis from the province at great cost last year found themselves pinned down and unable to halt the terror group’s largely unopposed advance towards the city at the end of last week.