陆战

钢铁雄心 IV

陆战

集团军

陆军师

作战计划

陆军战斗

步兵科技

支援科技

装甲车辆科技

火炮科技

陆军学说

战区

战区是玩家自定义的高级集团军，以及对战斗的总结，以及对即将发生的事情提供警报，并且可以为整个战区设置增援优先级

可以为空军与海军的指挥部提供警报，例如即将发生的入侵，正在进行的海战，以及敌军的空中优势

例如：德国向东部与西部战区分配部队，可以很容易的看出两条战线上的军队数量。一些玩家也可能希望在部署后使用部队训练过的单位，直到他们达到最高的训练水平（训练有素）并重新分配到战斗战区，或是驻军和防御港口与胜利点

要创建一个新的战区，如果不存在，只需要创建一个新的战区（见下文），首先选择一个集团军一个新战区的按钮会出现（右上角）点击这个按钮可以创建一个新的战区，并将选中的集团军移动到这个战区，右键点击战区，可以将选定的集团军转移到不同的战区

Theaters may be named as desired by clicking on the gear icon to the left of the name (clicking on the existing name is not sufficient). Players may add as many theaters as they like.

You can analyze the performance of each theater through the Combat Log, which is opened by clicking on the document icon to the right of the theater name. This displays the results of recent battles. You can filter the data by time (using the slider on the top left) or command group (by toggling the icons with haloes on the top right). With the Together for Victory DLC, the Combat Log also displays equipment losses and analyses performance by template.

Caution: The theater interface shows only divisions that are assigned to a command group. Unassigned divisions are shown in the armies list.

Command group

主条目：Command group

A command group is a collection of divisions that can be led by a single commander. Each command group is part of a theater and can be moved to a different theater at will.

Command groups allow divisions to be given orders through the battle plans interface, such as assigning to a front and giving a plan of attack, specifying an area to garrison, or giving a fallback line. The commander of each group in the currently selected theater (or a vague silhouette if it has no commander) appears at the bottom of the screen. If it has one or more attack plans assigned, this portrait will have a button to activate the plans, a button to halt the execution of the plan, and a bar below it showing the AI's assessment of relative strength.

Border conflicts

主条目：Border war

This is enabled by certain events or decisions. In areas where borders are disputed by neighboring rivals, a decision may become available (Requires Waking the Tiger), or an event may fire triggering a border conflict.

A victorious invader gains the disputed state and some PP (e.g., +100 PP in China). In a stalemate, the border remains unchanged, both sides get some Army Experience, and the defender is rewarded with substantial PP for holding on. A defender that defeats the invader gains additional PP, Army Experience, and Land Doctrine research bonus as a reward. A failed invader must wait for a time before trying again. This version of the conflict is used by warlords in the Waking the Tiger DLC.

There are Decisions for the attacker and defender to choose to escalate the scope of fighting one step further to allow adding troops and taking things a step closer to full war. Lend-lease is only available for countries in full war, so is not available based on just a border war. The vanilla game is configured to limit opposing countries to one border conflict at a time between them.

Naval transport

Troops can be transported across the water and between two friendly ports. When a division is standing at a port, simply right-click another port to have them attempt to transport themselves there. Transporting troops requires convoys equal to the division's weight rounded up, and if the country or its allies do not have naval supremacy over the sea region, they may be intercepted resulting in casualties. If a division is not standing in a port, right-clicking on the port province, then shift-clicking on the destination port symbol will allow it to be transported in a single order.

Alternatively, a battle planner command (frontline, fallback line, naval invasion or garrison) will automatically move a unit across an ocean tile if there is no accessible land path to the target and enough convoys are available to transport the unit.

Naval invasion

主条目：Naval invasion

Naval invasions are launched via the naval invasion order in the battle planner.

There is a limit to the number of divisions that a single country may assign to naval invasions at one time. With the basic Transport Ship technology, only 10 divisions can plan an invasion at once; with  Landing Craft this increases to 50. Multiple invasion plans can be set up from a single command group; each plan must start from a friendly port and the total number of divisions must not exceed the level of transport technology.

An army can also move into friendly territory using an invasion, but it is more efficient to simply use port-to-port movement as described above.

Statistics

For land unit base stats reference base stats.

For land unit combat stats reference combat stats.

Battle

主条目：Land battle

When divisions of opposing countries meet, a battle takes place.

战争 

机制 

事件与决议

事件 • 决议