Navy fails to block AI moving troops across strait of messina

[alan]

Anyone know the rules for a navy blocking troop movemnet over a strait?
The example I have is the strait of Messina where the AI rolls up troops and across they go, even though I have a 21 ship fleet parked on the sea square and the land attack pop up shows my naval bombardment and air superiority, not what I expected, especially as there is no evidence that the AI is using convoys which is the only other way I can see how it could be done. Advice?
(I have a screenshot but its beyond my ability to work out how to post it here, the help file isn't exactly helpful enough)

[drewbstar]

Click on the screenshot from your profile. Right click and copy/paste the URL from the page that opens up.

[alan]

https://steamuserimages-a.akamaihd.net/ugc/947334319834660666/A387D20A968D7EEBEAD148B4CF83122E8BE0EE5E/

[|H|H| Fr3ddi3]

Originally posted by Latios:

Crossings like that do not require convoys or navies to get over, armies just take a penalty from 'crossing'. I hope they think about something like that in MTG, as it dosen't make any logical sense.

In other news...that's a lot of political power there. Do you know how to use it?

A navy on a hold order, in that strait, should be preventing enemy divisions from crossing in either direction but according to the OP enemy divisions are passing freely for some reason. Thats the question being asked.

They could be circumventing the strait crossing via a naval convoys but you'd see the convoys en-route, so it's not likely to be that.

I'm interested to see if anyone has any suggestions as iv'e never encountered this before having carried out the exact same 'operation' countless times.

[alan]

Political power isn't relevant, unless this issue only occurs on civilian & non-ironman, and with those same settings if you play axis into the dutch east indies and chase out the fleet from the second island it blocks the crossing between the two islands for axis troops. So I don't think its civilian and non-ironman related.

[andersrlarsen]

not really sure why pdx havent, but messina isnt set as a strait province.
https://hoi4.paradoxwikis.com/List_of_provinces
it is probably set as a land conection, and therefore you cant blockade them

however, i do agree that you do have alot of un-used pp. not that it has anything to do with your question, just think that it should be used...

[|H|H| Fr3ddi3]

Originally posted by andersrlarsen:

not really sure why pdx havent, but messina isnt set as a strait province.
https://hoi4.paradoxwikis.com/List_of_provinces
it is probably set as a land conection, and therefore you cant blockade them

however, i do agree that you do have alot of un-used pp. not that it has anything to do with your question, just think that it should be used...

Messina will not appear on that list as a strait because it is not like Gibraltar, Panama or Suez (aside from the fact you can just go around it), none the less the crossing itself is still called a 'Strait', such locations on the map (places with red - - - connecting islands) have their own combat stats and can be cut of by a fleet on a hold order in that sea tile.