Units are the individual soldiers, tanks and vehicles that make up your forces. Each unit has unique abilities, costs, strengths and weaknesses which, when added together, define the nature of your army. Each unit is made up of a number of statistics, properties and abilities. You can access these statistics by selecting a unit and looking at the information panel.
• The Attack value is an indication of how effective a unit is at damaging enemies. If you hover your cursor over the Attack Value icon, you can see additional useful information, such as the unit’s Rate of Fire and whether its attack can damage other units near its target.
• The Defense value is how resistant your unit is to being damaged.
• Special abilities, such as the ability to repair buildings, are represented by icons below the attack and damage values. Some units have unique properties. For example, a tank is especially resistant to small arms fire, more so than its defensive rating would suggest. Special unit properties appear as icons along the top of the information panel. Hover your cursor over any of them to get more information on what they do. Here you can also acquire details about modifiers brought on by special conditions, such as formations or terrain.
You do not command individual units in Axis & Allies. Instead, you command groups of units called regiments. A regiment is a group of between two and eight units. The units in a regiment may be identical, such as an Infantry Regiment with eight Infantry. They may also consist of different types, such as a Mechanized Infantry Regiment with three Infantry, two Machine Gun Infantry, one Light Tank and two Halftracks. To build a regiment, select a structure capable of deploying it (normally a Division HQ) and click on the Deploy icon
[D]. The command panel changes to show an
icon for each type of regiment. Each type is composed of a number of units chosen for a specific purpose, such as anti-tank or anti-air. If an icon is gray, you lack the support building necessary to build that particular regiment (the popup description of the grayed-out icon tells you what you need to build in order to access that regiment). Once you have chosen the regiment you wish to deploy, click on its icon and the structure starts building it. After a few seconds, the first unit of your new regiment appears. At first, you see only the one unit; selecting it shows you that the images of the remaining units in that regiment are grayed out. As you watch, the health bar below the first gray image starts to fill up. When it is full, that unit appears and joins the regiment, after which the next gray unit’s bar starts to fill. This process continues as long as your new regiment is in supply (
Healing and Supply), until the regiment is complete.
Source: Axis and Allies RTS Official Manual