Rather disappointed with the way the AI deployed the US Navy in my campaign playthrough. I managed to achieve dominance of the Atlantic, having destroyed the Royal Navy and most of the US Navy. I then setup a screen with my fleet covering the approaches to France, the English Channel and Ireland as shown below. This screen was sufficient to stop ALL attempts by the AI to send US units to invade the territory the Axis held.
Initially, the AI managed to slip one AVL through and land in France. All other AVLs in the group were destroyed by the naval units in my screen. I was surprised to note that each AVL convoy was not accompanied by any protective units (e.g. BB, CA etc.). Although at this stage in the game the US may well have not yet managed to build any to replace their losses. Later, more groups of AVL craft bumped into my screen, always heading for the English Channel and again these were easily destroyed by the units in my screen. This was repeated again and again. At no time did the AI acknowledge that this strategy was a failure and switch to another one. I would have expected alternative strategies to have been employed such as an attempt to go via the Med and invade Italy, or head north around Scotland and invade Norway. Also, the failure to provide protection for the AVL convoys is a major flaw.
Late in 1945, when the US received the Pacific naval fleet, I was nervous and expected a major attack from these vessels. But no, instead the battle fleet remained at anchor in the US while easily destroyed AVL convoys kept heading for the English Channel like lambs to the slaughter.
I'll also post a screenshot of the US fleet at the end of the game.
In summary, I would suggest that the naval AI somehow acknowledge when a strategy is not working and switch to an alternative one. Plus, Transport, AV and AVL convoys should be provided with protection when it is available.
