Usage patterns
〈数〉塁に進むto advance to (a numbered) base
The batter advanced to second base.
塁を築くto build a rampart/fortification
The soldiers built a rampart on the riverbank.
塁に立つto stand on base
The runner is standing on first base.
塁を守るto defend a stronghold
They kept defending the isolated stronghold with a small number of soldiers.