Comment by em-bee

scouts also used the salute. they likely adopted it from the bellamy salute:

https://www.alamy.com/stock-photo-a-glass-plate-photograph-o...

https://www.gettyimages.co.uk/detail/news-photo/girls-scouts...

https://www.alamy.com/fine-70s-vintage-black-and-white-lifes...

this last article alleges that the bellamy salute itself was meant to spread national socialist ideology and the police state which is of course absurd, but it has some good historical photos that are worth looking at:

https://rexcurry.net/pledge-of-allegiance-scouting.html