A Star is the basic building block of Clan military forces. It consists of five Points working together to provide the most firepower in a unit with the smallest logistical footprint. A Star is commanded by a Star Commander.
This formation consists of five OmniMechs or, in the case of garrison and some second-line units, five standard BattleMechs. At the Star level 'Mechs are organized together based on capabilities; grouping together 'Mechs of wildly varying weights, speeds, and offensive proficiencies is generally seen as an invitation for the enemy to divide them in the field. However while Stars are defined by the weight composition of their Points in a way similar to 'Mech ratings - Light, Medium, Heavy and Assault - each type need not contain only 'Mechs of that weight rating. The following table shows shows the various compositions that are typically used. It is unusual for a Star to contain all four 'Mech weight ratings, and so is omitted here.
|Light Star||Medium Star||Heavy Star||Assault Star|
|5 Light||1 Light, 4 Medium||2 Medium, 3 Heavy||1 Medium, 2 Heavy, 2 Assault|
|4 Light, 1 Medium||5 Medium||1 Medium, 4 Heavy||4 Heavy, 1 Assault|
|3 Light, 2 Medium||4 Medium, 1 Heavy||5 Heavy||3 Heavy, 2 Assault|
|2 Light, 2 Medium, 1 Heavy||3 Medium, 2 Heavy||1 Medium, 3 Heavy, 1 Assault||2 Heavy, 3 Assault|
Clan OmniFighter Stars consist of ten fighters and differ from 'Mech Stars in that mixed designs and weight classes are common. Medium-weight fighters dominate among the Clans' toumans along with lower-end heavyweight designs, although not to the exclusion of other weight types. Clan Naval Stars will contain five or six vessels, either WarShips, JumpShips or DropShips, often with an additional command vessel
Armor Stars consist of ten vehicles, but due to the Clans' prejudice against conventional armor these formations are commonly found in solahma or, more rarely, garrison units. Light and heavy-weight types are preferred, while medium-weight vehicles are particularly rare.
Clan Infantry Stars can consist of either Elementals or conventional infantry. Elemental Stars consist of 25 Elementals and play a far more prominent role in Clan warfare than conventional infantry thanks to their Battle Armor. Conventional infantry Stars consist of 125 soldiers, but are largely solahma or freeborn units and rarely incorporated into the standard Clan order of battle.
In general Stars which mix different unit types see their overall combat effectiveness severely weakened. One of the few exceptions to this rule is the strategic command Star, a formation first pioneered by Clan Wolf. It combines four Points of either OmniMechs or Elementals with an AeroSpace Point for reconnaissance and escort duty. The success of this formation has caused other Clans to adopt it, albeit in more limited numbers.
- Field Manual: Warden Clans, pg. 11-12
- Field Manual: Crusader Clans, pg. 9-10
- Field Manual: Warden Clans, pg. 10
- Field Manual: Crusader Clans, pg. 8
- Total Warfare, pg. 265
- Field Manual: Warden Clans, pg. 11
- Field Manual: Crusader Clans, pg. 9