Complex sentence: Sinjar Resistance Units militia took part in the August 2014 Northern Iraq offensive, killing at least 22 ISIS fighters and destroying 5 armoured vehicles in the vicinity of the Sinjar Mountains.
Split into simpler sentences: Sinjar Resistance Units militia took part in the August 2014 Northern Iraq offensive. Killing at least 22 ISIS fighters and destroying 5 armoured vehicles, in the vicinity of the Sinjar Mountains.