• Imperial Navy
• Stormtrooper Corp
• Starfighter Corp

• Naval
• Army
• Air Force

• Sector Group - The Imperial Navy's largest formal organizational unit was the Sector Group, nominally composed of 2,600 starships, of which 24 were Imperial-class Star Destroyers and another 1,600 were smaller warships, under the control of a High Admiral, usually the sector Moff.
• Fleet - The Sector Groups were split into multiple fleets of around 400 ships each led by Fleet Admirals, with the Group's combat elements being split between "Superiority" and "Escort". A superiority fleet was a space-combat force spearheaded by six Star Destroyers, each nominally accompanied by a battle squadron of eighteen smaller ships. While superiority fleets were officially assigned to fleet combat, in practice they were normally used as mobile reserves, projecting Imperial power in response to local threats. Escort fleets, meanwhile, were composed of force escorts and were designated for combat against pirates and raiders, which in practice meant that they were the Empire's first line of defense, protecting civilian freighters, attacking corsairs' hideouts, and guarding remote outposts. Additional fleet commands were established for the Sector Group's logistics and support forces, including troop transport, bombardment, deepdock and support fleets.
• Systems force - systems force, led by an admiral appointed as its Commodore. Systems forces totaled around ninety ships in several squadrons, and included force superiority designed to maintain control of space in calm areas; force escort to protect commercial shipments and convoys; systems bombard to carry out planetary bombardments with Torpedo Spheres; and transport forces, force technical services, and force support to supply combat formations.
• Squadron - Squadrons of 14 to 60 ships were the smallest independent operational units of the Navy, and were designated as light, heavy, battle, or bombard squadrons. Battle squadrons built around an Imperial-class Star Destroyer were the core components of superiority fleets, and were nominally supported by three lines of eighteen smaller ships. In practice, Star Destroyers were normally accompanied by just two or three escorts, if any: the Imperial-class was designed to operate without support, and its hyperdrive was too fast for any escorts except for the speediest light cruisers.
• Line - The most basic combat formation in the Imperial Navy was the line of battle, or simply a line, and the smallest organizational unit used for space combat. The Imperial Starfleet shaped four to twenty starships into lines, depending on type. The line was the most amorphous level of organization in the Starfleet. The Imperial Starfleet Order of Battle outlined seven types of lines: attack, heavy attack, reconnaissance, pursuit, skirmish, troop and torpedo.

• Legion - 9,813 units: 4 regiments (9,812 units: 8,192 troopers and 1,620 officers) led by a High Colonel. The largest defined level of organization within the Stormtrooper Corps, it is the approximate equivalent to an Imperial Army battlegroup. Depending on the specific size of the squads and legions composing it, a legion can even reach as high as 14,826 units, composed of 12800 stormtroopers and 2025 officers. The legions mere deployment and parading also act as a form of psychological warfare, being adept at manipulating the psychology of dominance while shielded in the eerie anonymity of their armor.
• Regiment - 2,453 units: 4 battalions (2,452 units: 2,048 troopers and 404 officers) led by a Lieutenant Colonel. A Stormtrooper regiment is considered sufficient enough to seize a Class A planetary starport. Depending on the size of the scouts and platoons, it may reach as high as 3,701 units, composed of 3,200 troopers and 505 officers.
• Battalion - 613 units: 4 companies (612 units: 512 troopers and 100 officers) led by a major. A Battalion is very likely to incorporate many types of specialized stormtrooper units, including scout troopers and incinerator stormtroopers. Depending on the amount of squad and platoon manpower, the units may reach as high as 926 units; specifically 800 troopers and 125 officers. In some cases, however, they also lacked of staff officers, which have them holding 820 men similar to that of battalions within the standard Imperial Army.
• Company - 153 units: 4 platoons (152 units: 128 troopers and 24 officers) led by a captain. Depending on the size of the platoons, it may reach as many as 231 units, specifically 200 troopers and 30 officers.
• Platoon - 38 units: 4 squads (36 units: 32 troopers and 4 officers) led by a lieutenant and a sergeant major. A platoon was variable in size, similar to a squad, with some platoons even reaching up to 5 squads, and by extension, 57 units: 50 troopers and 5 officers.
• Squad—9 units: 8 troopers, including a corporal, led by a sergeant. It was the smallest stormtrooper unit typically deployed into a threat situation; it could also include up to 10 troopers.

Although a Legion was the highest possible standard unit within the Stormtrooper Corps, various legions had been known to merge from other sectors into one unit within a Sector Group for a major offensive.^[15] Similarly, even though the squad was the lowest possible standard unit within the Stormtrooper Corps, the squad itself could be further subdivided into two Fire Teams, each being in a wedge formation, with the fire team leaders being at the tip of each wedge, in order to allow for maximum firing range every direction and allow for ready communications between members.^[14]

• Element: 2 starfighters, consisting of a leader and a wingmate.
• Flight: 4 starfighters in 2 elements.
• Squadron: 12 starfighters in 3 flights.
• Wing: 36 starfighters in 3 squadrons.
• Group: 72 starfighters in 2 wings, typical complement of an Imperial-class Star Destroyer

The typical formation of an Imperial-class Star Destroyer's wing was four TIE Fighter squadrons (one squadron was often equipped to be a reconnaissance squadron with TIE/rc starfighters), one squadron of TIE Bombers (lower priority ships had to make do with older TIE/gt fighter-bombers), and one squadron of TIE Boarding Craft. Often one or two flights in a fighter squadron were TIE/FC fire control craft. Sometimes one of the fighter squadrons was used for training purposes. By the Battle of Endor, one squadron had been swapped out in favor of a squadron of TIE Interceptors. During typical operations, two TIE squadrons provided screening for their Star Destroyer and any escort vessels, two conducted forward recon, and two were held in reserve.

TIE Fighters assigned to ground operations were Navy vessels, but their pilots reported to an Imperial Army garrison commander, organized into ground support wings. The Navy's insistence on retaining control of all starfighters meant that ground support wings were smaller than those assigned to Star Destroyers, and consisted of forty TIEs in ten flights of four fighters each. Three flights were TIE Bombers, six were sorted into two squadrons of TIE Fighters, and a single flight of TIE/FC fire control craft.

Notes:

• M: Royal and Ducal.
• X: Nobility.
• I: Minor nobility.
• •: Gentry.
• Baronet / Baronetess is the lowest Noble hereditary rank.
• Knight is the highest Noble rank that is not inheritable.

Battenberg markings are a pattern of high-visibility markings used primarily on the sides of emergency service vehicles.

Marking	Branch
	Police	Yellow / Blue
	Police	White / Blue
	Fire and Emergency services	Yellow / Red
	Fire services Command	White / Red
	Emergency medical services	Yellow / Green
	Emergency medical services	White / Green
	Coast Guard	Yellow / Orange
	Search and Rescue	White / Orange
	Civil defense	Yellow / Blue
	Civil defense	Blue / Orange