I want to check I understand the supply rules correctly:
Bengahzi is a secondary supply center, but it is cut off from primary supply centers, so it allows other resources connected to it by road a maximum supply level of 5. Bardia is a town, so in theory it could have a supply of 8, but maxes out at 5 because of Bengahzi's status.
If Bardia is cut off by road from Benghazi, then its max supply is 3.
While a naval unit next to a port will reduce the port's supply capacity by 1 per turn, this would not apply to Benghazi with respect to its status as a secondary supply center. That is, after 1 turn with a naval unit adjacent, Benghazi would remain at 5 and allow Bardi a max of 5 supply. However damage to Benghazi from naval bombardment or strategic bombing would reduce its supply capacity as a secondary supply souce. For example, 1 bombardment damage would reduce it to 4 meaning Bardia would max out at 4. Similarly a land siege of Benghazi would reduce its supply value for other connected towns.
Even with Benghazi captured, Tobruk would be at 5 supply since it is a port, but it would not act as a supply souce for Bardia town, which would have a max supply of 3.
Is this all correct?
I'm not sure how the Malta supply event impacts this.