Helldiver Regiments

Every once and a while I’ll see posts about different units and the people who play with them and was wondering how to find them. It doesn’t seem like there’s a tab for posts like that and being able to experiment with different play styles with a squad of non randoms would be cool. Where have y’all found them and what key terms should I use to look for those posts here? Additionally if you’ve found a group to play with from posts like that, has it been fun?