Allies who answer an offensive call to arms will suffer all penalties for breaking a truce, attacking nations they are in a royal marriage with, or having good relations with. When a nation declares war, it has the option of individually calling its allies into the fight. Nations who refuse to join will lose 25 prestige, the alliance, and trust with all their allies, even those not participating in any wars. Allies who answer a defensive call to arms will not suffer any penalties for breaking a truce, attacking nations they are in a royal marriage with, or have good relations with. If war is declared on a nation, it will automatically call on all its allies to come to its defense. The attacker may only call in allies during the first 30 months of the war. If no decision is made in regards to a call to arms, it will automatically be declined in two months. Any co-belligerent can also call his allies to war. The current war leaders in a war may send a call to arms to their allies at any point in time, asking them to join all their current wars in which they are the war leader. It is possible to estimate distances using the fact that diplomats travel at a speed of 20 distance per day between capitals. †: Distance between borders can only be seen in debug mode. −0.2 per distance between borders greater than 30 † −1000 per offensive war, 50 per defensive war If a nation has more diplomatic relations than its diplomatic cap (for most nations this is initially 4), maintaining agreements costs 1 diplomatic power a month for each excess nation.ĪI nations will only accept alliance offers if they have more positive than negative reasons for doing so:Īt 50 0, +0.5 or −2 per point above or below. Maintaining an alliance uses a diplomatic relations slot for each nation. Additionally, if either country has accepted a peace deal annulling treaties with the other, they cannot enter an alliance together for 10 years after the peace deal. Setting an allied nation as a rival will automatically break the alliance with this nation and prevents the player from allying again. Being in an alliance gives a major relationship boost ( +50 relations) between the two allied nations.Ĭertain attitudes of the other nation (such as hostile) may preclude them from choosing to be the player's ally. As long as there are more positive reasons than negative reasons, the nation will accept the military alliance. The player may ask a nation to form an alliance through their diplomacy screen. Please help with verifying or updating this section.