source: Twitter; Guardian (Nigeria); Defense Post
actor1: Islamic State (West Africa) - Lake Chad Faction
actor2: Military Forces of Nigeria (2015-)
location: Gana
notes: On 26 May 2019, ISWAP ambushed a convoy of civilians escorted by protected by Nigerian Armed Forces near Sabon Gari Gana (Damboa, Borno), on the road between Biu and Damboa IDP camp. NAF engaged ISWAP in a battle, but got defeated and 25 soldiers were killed. Information on the event are contradicting as NAF rejects any reports on the incident.