I don't even think it's possible to have a building as a requirement for a unit.Originally posted by joncnunn
4. WW II era naval ships required substantal inferstructure to build. More over, neither side built many naval units for this theater, mostly using naval forces already present and occansionly a spare ship. Accordingly, all naval ships should require a Dry Docks improvement to be present.
5. WW II era planes & tanks also required some interstucture be in place, accordingly all air units, plus all types of tanks should require a baracks be in place.