The Tarnak Farm incident, more familiarly known in Canada as "the friendly fire incident", occurred on April 17, 2002 near Kandahar, Afghanistan during Operation Apollo. The 3rd Battalion Princess Patricia's Canadian Light Infantry Battle Group (3PPCLIBG) was conducting night-time anti-tank and machine gun firing exercises, which were mistaken for enemy fire by U.S. Air National Guard fighter jet pilots. The pilots attacked, killing Canadian soldiers Marc Leger, Ainsworth Dyer, Richard Green, and Nathan Smith, and injuring at least eight others. They were the first Canadian casualties of the Afghanistan War, and the incident generated a massive public response. The collection consists of news clippings; printouts of online news stories; TV news clips; scrapbooks of news clippings; messages of condolence received by PPCLI in the form of email messages, condolence books, letters, and sympathy cards; eulogies of the deceased soldiers; and the contents of an album of photographs and memorabilia from Marley Leger's visit to Bosnia.