>>554902
Frankly speaking I have little to no knowledge of maritime laws, which like international laws can be easily disregarded given your power level.
Apparently if you declare a naval blockade (https://en.wikipedia.org/wiki/Blockade) you have to follow a lot of rules:
http://www.gwpda.org/naval/lusiblck.htm
>The basic scheme is that a blockade, to be legal, MUST be effective: the term is a bit hazy, but, essentially, means that the bulk of enemy and neutral merchant shipping must be subject to being stopped. Once the blockade is LEGAL, then a belligerent ship may STOP a neutral or enemy merchant vessel and inspect it. If the cargo is found to be actual or conditional contraband, it can be seized without payment, though this can only be done once the ship is taken to a friendly port (which may be neutral) and a judicial proceeding is held to confirm that the cargo was indeed "contraband". (If the cargo is not contraband but is, for instance, food, it must be permitted to pass unhindered.)
All of this hassle can circumvented by not declaring a blockade and just doing commerce raiding.
https://en.wikipedia.org/wiki/Commerce_raiding
Or by using submarines:
https://en.wikipedia.org/wiki/Unrestricted_submarine_warfare
>the London Naval Treaty required submarines to abide by prize rules. These regulations did not prohibit arming merchantmen but having them report contact with submarines (or raiders) made them de facto naval auxiliaries and removed the protection of the prize rules. This rendered the restrictions on submarines effectively useless. While such tactics increase the combat effectiveness of the submarine and improve its chances of survival, some regard them as a breach of the rules of war, especially when employed against neutral vessels in a war zone.
Interestingly, the Allies had declared a naval blockade of Germany and Germany returned the favor. Per the initially mentioned laws (prize rules) both should have conducted boarding operations but in the end it was a free for all affair. Also both sides used armed cargo ships further mucking the issue:
https://en.wikipedia.org/wiki/Merchant_raider
https://en.wikipedia.org/wiki/Armed_Merchant_Cruiser
https://en.wikipedia.org/wiki/Defensively_equipped_merchant_ship
Americans also conducted unrestricted submarine warfare against Japan and carried out even more indiscriminate mining of Japanese ports:
https://en.wikipedia.org/wiki/Allied_submarines_in_the_Pacific_War
https://en.wikipedia.org/wiki/Operation_Starvation
>Allied actions in the Pacific are believed to have been a mitigating factor in reducing the sentence of Großadmiral Karl Dönitz following the Nuremberg Trials, who was accused of similar actions in the Battle of the Atlantic; indeed, Admiral Nimitz provided Dönitz with a statement saying his boats behaved no differently.The official judgment of the International Military Tribunal cited the statement as part of the reason Donitz's sentence was "not assessed on the ground of his breaches of the international law of submarine warfare."