army
to join the army

banner
to join the banner of

battle
to join the battle

club
to join a club

colour
to join the colours

force
...to join forces (with) / to combine forces (with)

issue
to join issue

join
...England was joined to the Continent

join in
participar (em)

join on
ligar-se

join together
juntar

join up
associar

majority
to join the majority

redemption
to join a society by redemption