Louis Sadler is a Canadian superhero during World War II and the occasional ally of the Invaders in their battles against Hitler and the Nazis.
[1] After the war, he goes underground with his crime-fighting and eventually reveals his public identity in 1963 so that he can devote time to raising his son, Michael, his proudest achievement.
Later, when the news is making a cause celebre out of a baby with HIV, he goes on a rampage, believing society did not care about Michael's fate due to his being gay.
Bearing the rank of staff sergeant in the Royal Canadian Mounted Police, Sadler takes the codename Major Mapleleaf to honour his father.
[5] Along with Guardian, both incarnations of Puck, Vindicator, and Shaman, Major Mapleleaf is among the Alpha Flight members killed by the Collective.