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World Trigger Wiki

The First Large-Scale Invasion was an attack by Trion Soldiers in Mikado City four and a half years before the start of the series. It killed over 1200 people, and over 400 people are still missing.[2][3]


The day Neighbors invaded

The attack was carried out by an unknown Neighbor nation on Mikado City.[4] Conventional weapons proved ineffective against the alien invaders[4]. In just two days over 1200 people died, and over 400 were missing[2], some of whom were presumably abducted. The eastern portion of the city was destroyed, causing many to lose their homes. The attack was ended by Border, which went public after the incident[5].


  • The large-scale invasion started on a Sunday.[6]


  1. World Trigger Anime Episode 22
  2. 2.0 2.1 World Trigger Manga and Anime — Vol. 1 Chapter 3 (p. 13) and Episode 2.
  3. World Trigger Manga Chapter 84 (p. 7)
  4. 4.0 4.1 World Trigger Manga and Anime — Vol. 1 Chapter 1 (p. 5) and Episode 1.
  5. World Trigger Manga and Anime — Vol. 1 Chapter 1 (p. 8-9) and Episode 1.
  6. World Trigger Manga and Anime — Vol. 17 Chapter 144 (p. 11) and Episode 80.


e - d - vEvents
Pre-Series Calvaria vs. Spinthir
Introduction Arc First Large-Scale InvasionRad Infestation
Black Trigger Capture Arc Yūma Kuga vs. Miwa SquadYūichi Jin and Arashiyama Squad vs. Border's Top Teams
Border Enlistment Arc Border Member Official Enlistment DayOsamu Mikumo vs. Sōya KazamaOsamu Mikumo vs. Shun MidorikawaYūma Kuga vs. Shun Midorikawa
Large-Scale Invasion Arc Second Large-Scale InvasionTamakoma First vs. Hyuse and VizaYūma Kuga vs. VizaYūichi Jin vs. HyuseOsamu Mikumo and Shūji Miwa vs. Hyrein and MiraBorder vs. Hyrein and Mira
B-Rank Wars Arc Tamakoma Second vs. Yoshizato Squad vs. Mamiya SquadTamakoma Second vs. Suwa Squad vs. Arafune SquadTamakoma Second vs. Suzunari First vs. Nasu SquadTamakoma Second vs. Ninomiya Squad vs. Kageura Squad vs. Azuma SquadGalopoula's InvasionTamakoma Second vs. Katori Squad vs. Kakizaki SquadTamakoma Second vs. Ōji Squad vs. Ikoma SquadTamakoma Second vs. Kageura Squad vs. Azuma Squad vs. Suzunari FirstTamakoma Second vs. Ninomiya Squad vs. Ikoma Squad vs. Yuba SquadKatori Squad vs. Suwa Squad vs. Nasu Squad