there was a bug in one patch once, where you could infinitely reinforce rear echelon squads. people were running around with 20+ men in one squad. in fact i made a video of a game i played of that.
https://www.youtube.com/watch?v=hQzr_wNk54E&list=PL_V8I5DMzzzYO2QvefBQQhpA5ztNOtOV6&index=34
Lmao. Here I was thinking that a squad of rear echelons might actually become useful after it has 10 men but it was still trash.