I believe this is working as intended (seeing the offensive and defensive firing values of the forts) but I believe not all new players know this (at least I didn't). Thus I believe it might be of some interest for new players, as I suspect the more veteran players are well aware of this and will "ruthlessly" use it in PBeM games

See for my pre-liminary ramblings on the matter here
Test nr 1.
Admiral Foote with a 129 power (read: *BIG* for a river-fleet) fleet vs Island 10 fort and garrison.
The garrison before bombardment:
Foote is ordered to move back and forth around Island 10.
In all the fort and garrison was able to score 18 hits on Footes ships. That made a couple ships slightly red, enough for them to stay in port for one turn. The garrison on Island 10 however was evaporated, and thus a single regiment could walk in and take it.
Test nr 2.
Admiral Palmer with a fleet of 133 power (read: pretty damn small for an ocean fleet) vs Fort St.Philp and garrison (near New Orleans).
Palmer is commanded to move back and forth adjacent to Ft.St Philip (from "North Mississippi Delta" to "Lower Mississippi River" and back and forth).
In all, the fort was able to score 22 hits on Palmers fleet, just a scratch. The garrison on the other had was again evaporated. Thus a single regiment can now land and take the fort.
What is more interesting, it takes 5-7 days to unload a regiment from a ship, while it takes 1-2 days for a fleet to move from area to area. Thus, take along two fleets. One to bombard, one to transport. The transport holds still and unloads the regiment, while the bombarding fleet runs back and forth (even with a slow start they'll be able to nuke twice on the fort, which is enough according to my tests).
If you want to be safe, just make the invasion a two turn project (but you can then safely take several forts in one go). On turn one the transport fleets move to position adjacent to the forts, while the bombard fleet moves from fort to fort nuking the garrisons to dust. On turn two the transport-fleets unload the infantry on to the garrisons (and the bombard fleet can return to port to lick its minor wounds and prepare for next bombard run).
One can but wonder why the Bombard command can be used only in conjunction with a land attack, as the fleets are very capable to turn forts to dust in just one turn. Also, using the Bombard command allows the fort to shoot with its *much* higher Defensive fire, which makes them way more effective against fleets. No wonder I used to make my amphibious attempts go poo-poo, but with this new (new for me, that is) strategy it is easy as eating pie
