source: Twitter; Guardian (Nigeria); Sun (Nigeria); Legit
actor1: Islamic State (West Africa) - Lake Chad Faction
actor2: Military Forces of Nigeria (2015-)
location: Geidam
notes: On 20 April 2020, ISWAP attacked Geidam (Geidam LGA, Yobe) and were repelled by Nigerian Armed Forces. 13 ISWAP fighters were killed and equipment seized.