How Nigeria Lost a Brigadier General to ISWAP

Since the Boko Haram and ISWAP insurgency began in 2009, Brig-Gen. Dzarma Zirkusu, is the most senior officer to die in the line of duty. Zirkusu alongside some other soldiers died in an ambush laid by the Islamic State in West Africa Province (ISWAP), a splinter group of the Boko Haram sect. what is the implication of this attack?