(だん) An association or brigade... but usually used about volunteer groups such as volunteer fire-fighters, or Neighborhood Watch. Not to mention the 暴力団 (the newspaper/police word for yakuza).
(たい) Squad – usually used with military (or marching band or fire-fighter brigade, or ambulance crew!)
(だんたい) Any organization. Unlike the other ‘tai’, (隊), 団体 does not have any military feeling.   $$$
(ぶたい) Military unit.
() Xxx club.
(はん) Is a squad too, or a team or a task force or something