When naval forces bring heavy guns ashore

What would naval involvement add to the land battle under discussion?

It would bring much heavier artillery and could produce armoured railway mounts or other improvised land platforms.

Naval involvement would increase the weight of artillery available in the land battle being discussed. The British Army could request a large gun from the Royal Navy when its own weapons were insufficient for the intended target. The example envisages an armoured train carrying naval artillery inland. A further suggestion is that such cooperation could bring forward larger landships, although their design is not developed here.