内战

内战（Civil War），是由于一个国家的意识形态分歧所造成的国家分裂，并因此引发两个独立国家之间的战争，每个交战国的目的都是完全吞并另一个交战国。只要条件满足，游戏中的任何国家都可能因为彼此之间意识形态的相互抵触，而触发内战。

西班牙内战期间的西班牙

引发内战

内战可能基于某种非政府主流意识形态的多数支持而发生。如果一个国家目前的某种非政府主流意识形态的支持率变得过高，那么他们将会要求改革政府。如果玩家无视或拒绝改革政府，内战爆发的机率就会增加。某种日益增长的意识形态的政党也有可能会发动政变，从而实现和平过渡，而不是引发内战。

民意和政府顾问影响

一个国家可以通过选择相应的政治顾问来影响其本国的意识形态的支持率，这将导致他们在选择政府内部支持政变或民众支持之间做出选择，从而加快意识形态的支持率增长速度。尽管选择民众支持并非不可能导致政变的发生，但确实增加了政变发生前内战事件触发的几率。当宣传某种意识形态的政治顾问很活跃时，将偶尔会出发一些影响该国意识形态支持率的事件，或者增加某些民族精神，这将加快意识形态的转变。

内战也可能由外国企图发动的政变引发。为此，一个国家必须提供 200 政治点数（每天0.5点）和步兵装备。其所需的步兵装备数量似乎与目标国家的核心人口有关。这个国家的人口越多，一个国家为内战做准备就必须提供更多的步兵装备。

内战爆发后，该国将会分裂为两个独立的国家。给予一方的领土数量取决于主导该国的意识形态的支持率。交战双方，在内战爆发后将立即彼此进入战争状态，为自己的国家而战。一旦内战爆发，内战将演变为一场正常的战争，某一方胜利点的多少将最终决定双方的最终去向。唯一的区别是，在内战中胜利一方所占领的领土没有占领法案可供选择，因为已经成为该国的核心领土。

分裂国家

内战爆发后，根据预先设定的事件或交战双方意识形态的支持率，原先国家的军队将被分为两部分。例如， 法国内战双方的比例是80％和20％， 苏维埃联盟内战双方的比例可以是82％和18％，70％和30％或50％和50％ ，其根据相应的情况拆分。

训练中的陆军师，海军舰艇，空军，储存的装备等也将按照百分比划分。内战中的两国都继承了所有已完成和进行中的科技。

交战双方被认为是不平等的，其中一个被认为是原始国家，另一个被认为是分裂国家。即使原来的国家具有不同的意识形态，但它的原始国家也会保留其原国家Tag，而分裂国家将会获得一个新的国家Tag（例如德国（法西斯主义）点出“反对希特勒”国策时，由于奥古斯特•冯•马肯森的“德意志军政府”（中立主义）被视为原始国家，而希特勒的德意志国（法西斯主义）被视为分裂国家，所以德国tag（GER）被给予德意志军政府，而德意志国则被给予一个新的国家tag）。

原始国家国家保留所有雇用的政治顾问，设计企业和理论家以及陆军和海军的将领。它还保留了所有积累的政治点数，陆军/海军/空军经验和未使用的科研加成；而分裂国家则一无所获。

影响正在进行的内战

内战可以在许多方面受到外国势力的影响，其中最值得注意的两个是派遣志愿军和起草租借法案。

内战爆发后，为反叛军提供步兵装备的国家可以通过借租提供额外的装备，从而提供进一步的支持。一个国家除了提供诸如步兵装备之类的基本装备外，还可以选择为反叛军提供诸如坦克或火炮之类的先进装备。这可以使反叛军更有效地增强其军事力量，从而使他们比对手更有优势。

派遣志愿军是影响内战进程的另一种方式，也可以用于在没有主动加入战争的情况下获得战斗经验。为了使一个国家能够派遣志愿军在内战中帮助一方，派遣国必须与目标方保持和平（尽管不一定是对立的一方），并且不得加入其阵营。除此之外，派遣国必须部署足够的陆军师来派遣志愿军。

可以派遣的陆军师的数量比是20：1，即每20个师可派遣1个师作为志愿军（向下取整，因此19个师或更少，将意味着无法派遣志愿军）。例如，176个现役师意味着可派遣8个师，而181个师则意味着9个师可以被用作志愿军。请注意，只有1个营的一个师与拥有25个营的一个师是一样的计算方式；派遣国必须至少拥有30个师的基数才能派遣志愿军。此外，目标国家的每20个省份中必须要有一个师。参见：战争#志愿军

预先设定的内战

有些内战通常是在历史上发生的，因此，目前西班牙内战是预先设定内战的唯一的例子。在这种情况下，国家的领土划分是基于历史情况的。这些内战虽然有预先设定，但也可能受到外国势力影响或通过派遣志愿军和起草租借法案从而进行干预。

战略

如果您选择的话，您可以将内战纳入您的军事战略指正。一个国家可以选择在另一个国家发动内战，以在入侵之前削弱它们。例如， 德意志国在 苏维埃联盟发动内战，以在入侵前削弱该国。

但是，您也应该牢记，如果一个外国正在加入内战的一方作战，由于他们是独立的国家，因此在另一方投降后，您无法对投降的一方提出任何要求。这意味着一旦和平会议开始，您将无法对您占领的任何领土提出任何要求。 However, one should be mindful that if a break-away state is fighting a civil war and its opponents are taken out by a foreign power, the break-away state will retain control of its initial territory while the foreign powers will only be able to make demands on the nation they targeted, due to them being separate entities. This means you will not be able to make any demands on territory controlled by the rebels once the peace conference starts, meaning that starting a civil war to safeguard an invasion turns the conquest into a two-stage affair. Invading and defeating the target nation first, then invading and defeating the rebels after that.

If, on the other hand, one needs to trigger a civil war within their own country for reasons such as changing ideology (either through focuses or decisions), then there are two ways that you can easily win a civil war.

• If one is in charge of a small country (i.e., Greece, Bulgaria): train a single cavalry or motorized unit, and disband all other units. Deploy the unit and have it take all the victory points. While it is possible that the AI will train units by that point, it will not stop you from winning with this strategy as long as you keep on moving the cavalry/motorized unit.
• If one is in charge of a medium/large country (i.e., Germany, France): Get ahold of some army exp (through fighting in a war, exercising your troops, lend-lease, or sending an attache), and use that to design a template with a single artillery unit (anti-tank or anti-air will work just fine if you wish to use those instead). Train multiple copies of that unit, disband your entire army, and deploy the trained units at the start of the civil war. After your forces are split, change the divisions you kept to a different template. Because the AI will never change the template, this will make their army incredibly weak, and also give you a large number of units (which is helpful if you happen to have a civil war where, in addition to splitting the existing military, both sides will spawn new units).

In the case of the German Civil War, there are several additional strategies one can use to make it easier:

• If one sends all the equipment they have in a lend-lease to another nation that is at war a day before the war fires (either the Spanish Civil War or the Sino-Chinese War), and cancels the lend-lease after the war starts, the player will have all their equipment.
• If one conquers either Poland or Czechoslovakia beforehand (the former is very easy; the latter is harder, as it is guaranteed by France and Romania), the borders will not adjust and the Nazis will not take any Polish/Czech territory; as such, the Nazis will be forced to use the troops they spawned to take the unoccupied lands, and leave the borders near where the Landstrumregiments you start with spawn unprotected. If you spawn units in Poland or Czechoslovakia, they can keep the Nazi Landstrumregiments occupied while you use your Landstrumregiments to secure the victory points.

In the case of the American Civil War, the strategies differ depending on if one goes fascist or communist, as this will drastically impact the borders.

• If one is attempting to have the US become communist, the 13 states that broke away during the first civil war (Texas, Arkansas, Louisiana, Tennessee, Mississippi, Alabama, Georgia, Florida, South Carolina, North Carolina and Virginia) will break away; if one does not complete "Guarantee the American Dream" before hand, they will also lose the Midwest. As such, it is recommended that one beeline for said focus. Fortunately, you will not have your forces split when this war begins, so if you position your troops on the borders of the states that will break away, it will be very easy to move downwards and defeat them. Deploy some cavalry (5 divisions should be plenty) near Texas to secure the oil supplies - the capital can vary (sometimes it can be Richmond, VA; sometimes it can be Mobile, Alabama), but deploying 5 additional cavalry closest to where the capital is can help as well (if you train 2 sets of 5 divisions but don't deploy them, you should be fine). Use your navy to ensure naval superiority on the East Coast and stop naval invasions.
• The war to become fascist is much harder. Preparations beforehand can include converting the military factories in New England and the West Coast to Civilian Factories and taking the focus "Recruit the Free Corps" can help you deal with infantry losses. Taking "Work With the Bund" will prevent the Midwest from breaking free.

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