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Diplomacy

Manage relations through Nation Menu → Diplomacy (Java), or the /nation treaty commands. All diplomacy actions require the Manage Diplomacy permission. Two nations can hold one relation at a time.

Relation types

Relation Meaning Blocks war? Breaking it
Alliance Close partnership. Yes Starts a war cooldown (default 24h) before you may attack each other.
Non-Aggression Pact (NAP) "We won't fight." Yes Breaks instantly, no cooldown.
Mutual Defense Pact (MDP) Defensive alliance - allies can join your defense. Yes War cooldown on break.
Mutual Aggression Pact (MAP) Offensive + defensive - allies can join your attacks and defenses. Yes War cooldown on break.
Enemy A public hostile marker, declared unilaterally. No Clear it any time with treaty break - no cooldown.

Marking someone an Enemy doesn't affect war rules at all (it's purely a public "we don't like them" marker) - war is still gated entirely by nation mode, treaties, and the session schedule. See Declaring War.

Making and managing treaties

Command What it does
/nation treaty propose alliance\|nap\|defense\|aggression <nation> Offer a treaty.
/nation treaty accept <nation> Accept an incoming offer.
/nation treaty deny <nation> Decline an incoming offer.
/nation treaty cancel <nation> Withdraw your own outgoing offer.
/nation treaty break <nation> End an active treaty (or clear an enemy marker).
/nation treaty enemy <nation> Mark another nation as an enemy - no consent needed.
/nation treaty list See your current relations.

You can also review signed pacts and pending proposals in Nation Menu → Library → Documents, where clicking a document lets you accept, deny, cancel, or break it directly.

Notifications

Whoever holds Manage Diplomacy in your nation is kept in the loop automatically - proposals, signed treaties, enemy declarations, and foreign aid all send an in-game message. If you're offline when something happens, you get the message the next time you log in. Logging in also reminds you of any proposal still waiting on your nation's response - if it's already been accepted or declined by someone else in the meantime, you won't see a stale prompt for it.