The Battle of Azati Prime was an indecisive military conflict fought during the Xindi incident in 2154. Four Xindi warships under the command of Dolim launched an unauthorized attack on Enterprise while in the Azati Prime system. Dolim was ordered by Degra, with the backing of the Xindi Council, to call off the attack before Enterprise was destroyed.
Prior to the battle, Enterprise Captain Archer formulated a plan to destroy the Xindi weapon in a suicide attack. However, upon entering the oceanic expanses of the planet Azati Prime, Archer was captured and delivered to the Xindi-Reptilians, who proceeded to torture Archer for information. Upon learning of the destruction of a Xindi monitoring station, the Reptilians ascertained the location of Enterprise, now under the command of Sub-Commander T'Pol, who wanted to find "a diplomatic solution" to retrieve Archer. The Reptilians, however, unilaterally decided to launch an attack, with the intention of destroying the Earth vessel. Under the command of Dolim, a squadron consisting of two Reptilian warships and two Insectoid starships approached Enterprise with orders to strike the craft.
Facing four Xindi ships, Enterprise was severely outgunned and outnumbered. With the Xindi's superior technology, the first few shots easily penetrated Enterprise's hull plating, leaving the hull exposed to Xindi weapons fire. Despite being outgunned, Enterprise's weapons fire managed to destroy one of the attacking Reptilian ships, before it began to sustain heavy damage. Enterprise's limited defensive capabilities led to its systems becoming exposed, as the Xindi targeted crucial systems, including weapons, communications, and propulsion. (ENT: "Azati Prime") Defenseless, Enterprise came perilously close to destruction. (ENT: "Azati Prime", "Damage")
Eventually, the attack abruptly halted. Degra, with the backing of the Council, had ordered Dolim to withdraw.
The battle ended in a tactical stalemate; the Xindi had lost one vessel, and Enterprise suffered extensive damage. Following the disengagement, Dolim remained resentful toward the other members of the Council for having to suspend an attack on an enemy vessel in Xindi space, which served to further divide the Council and the eventual launch of the weapon under control of only two of the Xindi sub-species, the Reptilians and Insectoids.
The damage to Enterprise was heavy. In addition to the extensive hull damage that could only be repaired upon its return to Earth months later, the primary warp coil was destroyed in the attack, rendering the ship unable to travel at warp speed; the crew of Enterprise were forced to steal a weaker warp coil in order to continue their mission. In addition, the starboard warp nacelle took heavy damage. The weapons systems were also severely damaged; following the battle, only the aft torpedo launcher was working, although the phase cannons and forward launchers were eventually repaired. Most of the primary systems were rendered inoperative, although they were eventually repaired over the course of the mission. C, D and E decks suffered hull breaches that took time to repair, cutting off access temporarily to parts of the ship such as Cargo Bay Two. Surveying the damage in the immediate aftermath, Malcolm Reed said he "really [didn't] know what's holding us together, but let's hope it doesn't give out." (ENT: "Damage") After being returned to the ship in an Aquatic pod, Archer admitted to the crew that Enterprise was in "bad shape," but also "still in one piece," adding: "Enterprise is a tough ship. She took more than anyone could ask her to and then some." (ENT: "The Forgotten")
Three crewmen were blown into space by explosive decompression, while at least some crew members, such as Jane Taylor and Kamata, died when sections they were in were exposed to space. In total, 18 crewmen were killed in the attack and dozens were seriously wounded. (ENT: "Damage")