大战

大战是《维多利亚2》中的一种特殊类型的战争。在1890年，“大战”的概念被发现之后，任何一场双方至少有两个列强的战争都将成为大战。除了常规的战争目标外，大战还有一个默认的战争目标：大战投降，这意味着失败一方的战争领袖必须解除其军事武装，并在一定时间内支付赔偿金。由于这一作战目标，大战需要比正常战争更高的战争分数来实现和平。在大战中，追加不合理的战争目标所增加的恶名减少到三分之一。

有时会同时发生两场大战。在这种情况下，三分之一的大国可能卷入一场大战中；而有时，所有大国都会卷入同一场大战。

Outbreak

当“大战”事件已经发生，并且一场战争的双方都有至少两个列强时，这场战争就会成为大战。

爆发大战最常见的原因是危机，因为危机中往往会有多个列强相互对抗。出于这个原因，希望阻止大战爆发的玩家必须掌握每一个危机。除此之外，阻止大战爆发非常困难。

Strategy

Great Wars can have severe effects on a nation's populace and economy, especially when fought on home soil. For this reason it is wise, just like the Great Powers in 1914, to mobilise quickly as soon as war looks inevitable. If possible, a quick drive into the heart of enemy territory once war is declared akin to that of Germany's Schlieffen plan can be a knock-out blow, but it is wise not to repeat the delusions of Germany in 1914; a defensive strategy must be considered.

While it is good to try and create your own strategies to end a Great War it is wise to learn from the actual people who fought in the First World War. Using the landscape around is key - for example, Germany had the very wise decision to take all the high ground for a natural defense in the First World War; this caused massive casualties against impeding British and French attacks. You should always try to create a defensive line on strategically beneficial land. It is also imperative to establish a naval blockade on your enemies' coast for the faster war score increase to end the war sooner.

Since Great powers have colonial nations overseas there is a tendency that they have huge manpower stocks leading to huge stacks of men being hurtled at each other. Getting yourself into a single pitched battle is possibly the biggest mistake ever; it is much better to spread your troops in medium stacks and look to whittle your enemy until a break in their defense appears. This is much better than, say, getting oneself into a "meat-grinder" (that is, a battle involving a huge number of troops with massive casualties) but if enough troops are available it might be a viable strategy to catch the enemy and use it as a distraction.

While this is dark it must be said, due to the mass amounts of casualties and damage a great war can do to both the victor and defeated it is a valid strategy to also undermine your allies. You could not participate in large battles and let allies do most of the lifting. While this will make them the victor and also determine the goals achieved, to what avail would it be if the country's man power stock was completely wiped? This would leave you, who took a step back, complete dominance of the global stage and be able to snag those ripe territories of newly discovered rubber and oil. This would leave the resources completely out of the reach of their weakened allies, which in a few years would give you huge amounts of revenue from the automobile and aeroplane industries.

In conclusion, Great Wars can be strategically similar to normal wars. It is worth noting, however, that it is wise to draft war plans in advance and to prepare for a worst-case scenario. Whilst certainly possible, do not assume the war will be over by Christmas.

Peace

Treaties after Great Wars can be incredibly brutal. It is likely some key territory will be taken from a defeated nation, as well as economic reparations demanded. In the position of Great Power, or even war leader, it is easy to take as much as possible from a defeated nation, even to the detriment of your allies who will also have added wargoals. It is not wise to be too greedy, as defeat in Great Wars is very humiliating for a nation and will lead to many startling consequences in the future. The same can be said of depriving an ally of a large number of wargoals.

世界大战

在patch 3.04更新后，大战可能会升级为世界大战，这需要研究大众政治（1905），并且胜方拥有至少50%的战争分。世界大战触发后，所有的战争目标花费的战争分将减少到30%，允许你彻底地砸碎旧的世界秩序。