source: Rocket Chat; Sahara Reporters; Twitter; Guardian (Nigeria); Inside Arewa (Nigeria); Daily Trust (Nigeria); The Cable (Nigeria); AFP; Nigeria Herald; Premium Times (Nigeria); Nigeria Punch; Daily Independent (Nigeria); Legit
actor1: Islamic State (West Africa) - Lake Chad Faction and/or Boko Haram - Jamaatu Ahli is-Sunnah lid-Dawati wal-Jihad
actor2: Military Forces of Nigeria (2015-)
location: Mainok
notes: On 13 May 2020, Boko Haram/IS attacked a military post of the Nigerian Armed Forces in Mainok (Kaga LGA, Borno). 5 soldiers were killed. BH claimed to have killed 17 soldiers.