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- inspired by, and located in the same area as Sierra 117. Note that the level is called Sierra 117; Sierra is the word used in the NATO phonetic alphabet41 KB (6,175 words) - 01:58, December 20, 2023
- UNSC Battle Group Sierra-3 was a battle group that fought in the Battle of 18 Scorpii that spurred Vice Admiral Preston Cole to seek out the Covenant at2 KB (151 words) - 15:48, September 10, 2023
- Sierra 117/Walkthrough (section New in Sierra 117)Sierra 117 is the first level in Halo 3, and as such serves as an introduction to the game's weapons and enemies. Overall, the level is fairly basic. The18 KB (2,479 words) - 13:46, March 22, 2024
- Combat Team Sierra was a UNSC Marine Corps unit. Combat Team Sierra was stationed aboard the UNSC Pillar of Autumn in 2552. During the abandonment of the1 KB (168 words) - 18:08, September 28, 2023
- Joint Task Force Sierra is a military unit within the United Nations Space Command testing Sangheili carbine holoscope technology with human industrial702 bytes (72 words) - 18:22, October 17, 2023
- UCMB Sierra Largo is a United Nations Space Command Unified Combined Military Boot Camp to which recruits are sent following enlistment. Admiral Preston669 bytes (74 words) - 03:59, March 20, 2022
- Following the pattern of the codenames featured in the sub-chatter record, "Sierra" (S in the phonetic alphabet) is the last initial and "10852" is the second1 KB (93 words) - 14:09, March 23, 2022
- UNSC After-Action Report: Battle Group Sierra-3 (section {Excerpt} UNSC After-Action Report: Battle Group Sierra-3)casualty reports attached. Battle Group Sierra-3 engages Covenant in 18 Scorpii. PRELIMINARY: Battle Group Sierra-3, comprising two UNSC destroyers and one4 KB (522 words) - 16:36, April 15, 2022
- Cut Halo 3 dialogue (section Sierra 117)game itself. The following lines of dialogue are found in the map files for Sierra 117. The following lines of dialogue are found in the map files for The5 KB (151 words) - 21:33, March 3, 2024
- 3 campaign mission, Sierra 117. <span class="error">Expansion depth limit exceeded Sprinkled throughout the dense foliage of Sierra 117 are carved hearts909 bytes (105 words) - 10:04, December 30, 2023
- forehead. In the background are mini-skulls. The Iron skull can be found on Sierra 117 on Normal, Heroic, or Legendary difficulty. To get it, at the end of1 KB (157 words) - 22:57, March 18, 2022
- Pelican's chassis. The player can be killed by Anvil-II missiles at the end of Sierra 117 if the player starts killing the surviving Marines and Arbiter when4 KB (446 words) - 20:29, June 17, 2022
- Master Chief Collection. It is unlocked by beating the par score on the level Sierra 117. The achievement is worth 10 Gamerscore. It is represented by a blue4 KB (595 words) - 22:56, March 18, 2022
- Collection. It is unlocked by beating the 15 minute par time on the level Sierra 117. The achievement is worth 10 Gamerscore and can be unlocked on any difficulty464 bytes (51 words) - 23:14, March 18, 2022
- name is a direct quote from a Pelican pilot in the Halo 3 campaign level Sierra 117. The Banshees on Winter Contingency will begin to fly near the ground2 KB (260 words) - 12:42, August 29, 2023
- eventually unlock while fighting with him, and can be obtained as early as Sierra 117. The achievement is worth 5 Gamerscore.588 bytes (57 words) - 23:07, March 18, 2022
- been declared. All units are mobilized and ready. Catherine-B320: This is Sierra three-two-zero, prepped for combat insertion. A massive plasma blast hits3 KB (360 words) - 00:08, February 29, 2024
- On the Halo 3 Campaign level Sierra 117, it is possible to take a "vacation", much like the numerous vacations one can take in Halo 2 and Halo: Combat4 KB (691 words) - 01:15, March 19, 2022
- level Sierra 117 was originally the Assassin Skull ("Interred where heroes fall"). Bungie eventually swapped them, putting the Blind Skull in Sierra 1172 KB (282 words) - 12:39, April 12, 2022
- 717th Xeno-Materials Exploitation Battalion (redirect from Sierra Company)(UNSC Marine Corps) Charlie Company (UNSC Marine Corps; heavy infantry) Sierra Company (UNSC Marine Corps) Blue Team (UNSC Navy; Spartan Special Warfare3 KB (290 words) - 09:12, December 9, 2023