There is an action menu command for men with backpacks to drop them ("Drop Assault Pack"). However, I cannot find a way to order them to pick up those packs which they dropped. If the player team switches to them, even the player cannot pick up the packs, using inventory or any other way. Adding a way to pick up those packs becomes important when you order the packs dropped by mistake.
If there is a way to have the packs picked up, please let me know, and you can close the ticket.
Using beta dev build 0.71.107360 {F20686}