[Business Insider] Igor Kolomoisky was once called Ukraine's "secret weapon" as the 52-year-old billionaire raised his own private army to fight off separatist forces attempting to capture the country's third-largest city. Now the government in Kiev faces a dangerous stand-off with one of its most important allies.The banking magnate was sacked by Ukrainian President Petro Poroshenko on Wednesday.
In March last year Kolomoisky, who founded Ukraine's largest commercial bank Privat Bank, had been appointed governor of Dnipropetrovsk Oblast, a predominantly Russian-speaking region in the east of the country.