Alliance Army The Alliance Army was a military branch containing the ground forces of the Alliance Military , consisting of the Alliance Special Forces controlled by Alliance High Command , and various Sector Force s controlled by a Sector Commander . It was later replaced by the New Republic Army . The Alliance Army was founded and operated until the Battle of Endor as a guerrilla force aimed at tying down and harassing an enemy force rather than meeting that enemy in open battle . An Alliance Army force could expect to be outnumbered in any given battle it fought against the Imperial Army , and as such its tactics were geared towards ' hit and run ' rather than a conventional battle . History . The Alliance Army was formed after the establishment of the Alliance to Restore the Republic in 2 BBY . It was the ground forces of the Alliance Military , consisting of the Alliance Special Forces controlled by Alliance High Command , and various Sector Force s controlled by a Sector Commander . It was formed from some of the early resistance groups to fight against the Empire . The Alliance Army was far from being as large as it ' s main opponent , the Imperial Army . Following the failure of Operation Domino , the Army was supplanted by the Alliance Starfighter Corps as the primary Rebel fighting force . The Battle of Hoth was one of the few ground engagements in which the Alliance Army fought in numbers and used conventional defense tactics , and in most of its battles operated as guerrilla raiding force , harassing and tying up Imperial forces . The Alliance Army combated Imperial Army ' s AT - ATs during the Battle of Hoth . Alliance troops found their light weaponry relatively useless against the heavily armored Imperial vehicles . The most effective weapon they used to combat the Imperial walkers were arguably the T - 47 . The Alliance Army ' s role during the Battle of Endor was mostly a commando operation , in which a small strike team was deployed to destroy the energy shield generator protecting the Second Death Star . The Alliance Army was operated until the Battle of Endor in 4 ABY and was later replaced by the New Republic Army . Soldiers . The Alliance Army ' s infantry was formed partly of the Alliance Special Forces , Sector Force s , and SpecOps divisions . Organizations formed of highly trained commandos and agents , who performed a series of guerrilla attacks throughout the Galactic Civil War with the aim of undermining , pilfering from and ultimately destroying the Empire . The rest of the Alliance Army ' s infantry was made up of Sector Force s with the vast majority of the personnel being Rebel troopers . Command structure . The Rebel Alliance Army and Sector Force had a largely standardized command structure . While it could vary from sector to sector , most Sector Forces used the following organization : Above the generals were the senior generals who usually held the title of Sector Force commander , followed by the Sector Force Supreme Commander ( Alliance / Republic ) . In the Navy , the rank of Petty officer , Chief Petty Officer , Ensign , Lieutenant , Lieutenant Commander , Commander , and Captain were the ranks beneath the rank of Admiral ( with Admiral of the Fleet as the Supreme Commander ( Alliance / Republic ) of the combined Alliance Fleet ) . Beneath the officers were the ordinary crewmen , generally referred to as Deckmen . Equipment . When in major battles the Alliance was known to utilize several different vehicles and military equipment . Some of them were from the Clone Wars era . Tactics . Compared to the forces of the Imperial Military , the Alliance ' s ground forces were woefully outmatched in numbers of troops , vehicles , warships and material . Because of this , Alliance commanders were taught to follow Madine ' s Rules of War . Striking the enemy at his weakest points , destroying their morale and outsmarting enemy commanders were seen as the best way for the Rebels to achieve victory during offensive operations . The same principle was applied to defensive operations . Army units were often tasked to provide cover while important Rebel assets escaped and other temporary holding actions ; extended defensive battles would always result in the Imperial Army eventually overwhelming them with superior numbers . A form of mobile defense was encouraged , whereby ground was given up when necessary in order to lure overextended Imperial forces into a trap . The Battle of Tiems was a classic example of this method and later used as an lesson to teach new Army commanders . Tactically the Alliance Army fought as a combined arms force , utilizing infantry , artillery , armor ( Combat Assault Vehicles or CAVs ) , scout units , ground transports ( Light Mechanical Vehicles or LMVs ) , and air support ( Sub - Atmospheric Craft or SAC ) . Because of shortages within the Rebellion , however , not all of these elements were always present on a battlefield . Reflecting the Alliance Army ' s way of fighting , most Rebel vehicles tended to be lighter and faster than their Imperial counterparts in order to outmaneuver them and either attack weak points or retreat in the face of overwhelming firepower . Troopers on board the " Tantive IV " were seen using a two - man buddy system for point and cover fire as a standard tactic . Behind the scenes . The Alliance Army appeared in the first of the " Star Wars " media , the of . " The Alliance Army featured in the Leia Organa campaign in the 2001 video game " . "