source: Vanguard (Nigeria)
actor1: Islamic State (West Africa) and/or Boko Haram - Jamaatu Ahli is-Sunnah lid-Dawati wal-Jihad
actor2: Civilians (Nigeria)
location: Gatamarwa
notes: 23 December. Boko Haram invaded Makalama village in the Gatamarua area, 21km away from Chibok (approximate coordinates), and killed one resident. Several civilians were injured.