Pro-Russian rebels in eastern Ukraine are preparing for a new offensive to expand their territory, signaling a six-week-old truce is in danger of crumbling. “We’ll try to push them from here to hell because we’re tired of them killing civilians with indiscriminate fire,” Alexander Khodakovsky, who commands the 3,500-man Vostok Brigade, said in an interview at his headquarters in Donetsk. The campaign may start in the “foreseeable future,” according to Khodakovsky, who also heads the security council of the self-proclaimed Donetsk People’s Republic. A rebel offensive would shatter the cease-fire negotiated last month in Minsk, Belarus, and raise the risk of escalating U.S. and European Union sanctions against Russia, which they blame for stoking the conflict. Ukraine and Germany, which brokered the accord with France, […]