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{{Effectbox|London Naval Treaty Signatory|file=Idea mtg naval treaty adherent|We have signed the London Naval Treaty and accordingly are restricted in the size of our capital ships.
|modifiers=
*Carrier Max Cost: '''9500[[File:Production cost (naval).png|link=Production]]'''
*Cruiser Max Cost: '''5300[[File:Production cost (naval).png|link=Production]]'''
*Heavy Ship Max Cost: '''10000[[File:Production cost (naval).png|link=Production]]'''
}}
}}
The London Naval Treaty (LNT) is a mechanic introduced with the {{icon|mtg|1}} DLC.
It limits the major powers of [[USA]], [[United Kingdom]], [[France]], [[Japan]] and [[Italy]] in terms of the maximum [[File:Production cost (naval).png|link=Production]] cost of carriers, cruisers and capital ships, as well as the number of capital ships in relation to the number of capital ships of the United Kingdom.

==The second London naval treaty==
The second London naval treaty is a mission that finishes in June 1936. During the mission, leaving the treaty is an option for the fascist treaty parties Japan and Italy. After the mission's conclusion, the naval treaty's limitations affect the maximum production cost [[File:Production cost (naval).png|link=Production]] for cruisers, carriers and heavy ships (heavy cruisers, battlecruisers and battleships).
If a country outside the treaty reaches a certain percentage of the British number of capital ships, they can be invited into the treaty. Should the nation decline and continue to expand their navy until near parity, the treaty nations can try to force them to disarm up to 80% of the number of capital ships. A refusal to disarm may lead to war. If a signatory nation exceeds the allocated amount of capital ships, they immediately get a mission to reduce the number of capital ships, at the threat of major stability loss.
The treaty becomes defunct after 2 major powers (except any chinese faction) are at war or when {{icon|World Tension|World Tension}} reaches 75%.

==Decisions==
===Second London naval treaty underway===
This is a 120 days mission starting on Jan 1st, 1936, during which the player nation can decide to withdraw from the treaty. After the mission ends, the only options left are '''cheat on the treaty''' and '''invoke escalator claus''' until certain {{Icon|World Tension|World Tension}} thresholds are reached.

===Withdraw from the treaty===
Fascist nations can take the decision '''Abandon the Naval Treaties''' for 50 {{icon|political power|PP}}, all others for 150 {{icon|political power|PP}} during the '''second London naval treaty underway''' mission, thus lifting the treaty's limitations for the withdrawing country. After April 30th 1936, 20% {{icon|world tension}} must be reached before the decision to withdraw becomes vailable again.
After a country withdraws from the LNT, a 365 days mission timer starts that changes the London naval treaty spirit for all remaining signatories to the '''Escalator Clause Invoked''' spirit.

===Cheat on the treaty===
Fascist nations can pay 50{{icon|political power|PP}} to cheat on the treaty, increasing the maximum [[File:Production cost (naval).png|link=Production]] cost of their ships while keeping the LNT in being and thus forcing non fascist treaty parties to still respect the limitations.

The limits are then raised by '''+400[[File:Production cost (naval).png|link=Production]]''' for cruisers, '''+1500[[File:Production cost (naval).png|link=Production]]''' for heavy ships and '''+750[[File:Production cost (naval).png|link=Production]]''' production cost for carriers for the cheating nation.

===Escalator clause invoked===
{{Effectbox|Escalator Clause Invoked|file=Idea mtg naval treaty adherent|One of the signatories of the treaties has decided not to follow the treaty any longer and is even now probably building larger and more powerful ships. Thankfully, a clause in the Treaties permits us to automatically invoke an Escalator Clause, which allows us to relax the restrictions on ship size and armament in this case. 
|modifiers=
*Effects in 365 days: Replace '''London Naval Treaty Signatory''' with '''Escalator Clause Invoked'''
*effective change: 
*Carrier Max Cost: '''+1000[[File:Production cost (naval).png|link=Production]]'''
*Cruiser Max Cost: '''+700[[File:Production cost (naval).png|link=Production]]'''
*Heavy Ship Max Cost: '''+2000[[File:Production cost (naval).png|link=Production]]'''
}}
At 20% world tension, or if another country withdraws from the treaty, a mission starts which replaces the '''London Naval Treaty Signatory''' with '''Escalator Clause Invoked''' after 365 days, changes the maximum cost for ships for treaty signatories.
==Becoming a treaty signatory==
When a nation that is not yet a treaty signatory reaches 20% of the capital ships of {{flag|United Kingdom}}, it gets an invitation to join the LNT. If refused, this gives a war goal to all signatories.