1st Infantry Regiment
The First Infantry Regiment was formed in 2220 as one of four regiments, formed to protect the fledgling NCR. The Fighting First won renown at Navarro in 2241 and again during the NCR-Brotherhood War and the Mojave Campaign during the NCR-Legion War, serving as the Hoover Dam Garrison. The First is considered one of the most prestigious of the regular infantry regiments, with only the best assigned.
2nd Infantry Regiment
The Second Infantry Regiment was formed in 2220 as one of four regiments, formed to protect the fledgling NCR. The Second was absent from Navarro, sent to the frontier to deal with remaining Khan holdouts. However, it would more than make up for its absence at Navarro by taking Helios One during the NCR-Brotherhood War and holding Camp Forlorn Hope against Caesar’s Legion during the NCR-Legion War. Despite being a founding regiment of the NCR Army, the 2nd is often regarded as an unlucky regiment, due to the high casualty rates it has suffered in its career.
3rd Infantry Regiment
The Third Infantry Regiment was formed in 2220 as one of four regiments, formed to protect the fledgling NCR. The Third fought at Navarro in 2241, winning renown as it held against repeated Enclave counter-attacks. In spite of heavy casualties, the Third held long enough for the Brotherhood of Steel to evacuate their wounded (and the hordes of Enclave data they had really been after). However, the lack of any support from the Brotherhood left the Third to lose 70% of its manpower and created a longstanding hatred of the Brotherhood and the Enclave within the Third, an institutional prejudice of sorts. The Third would rebuild its strength in time to battle the Brotherhood in Nevada, attacking Brotherhood patrols and allegedly refusing to accept the surrender of any Brotherhood member, regardless of rank, role, or ability to defend themselves. The Third would miss out on the Mojave Campaign and the NCR-Legion War, spending most of the 2270s hunting down remnants of the Brotherhood and the Khans in Nevada and northern California.
4th Infantry Regiment
The Fourth Infantry Regiment was formed in 2220 as one of four regiments, formed to protect the fledgling Republic. The Fourth would fight at Navarro, suffering heavy casualties as it attacked over open ground against the Enclave’s heavily fortified base. However, they would succeed in their mission of cutting off the Enclave’s retreat, allowing the First and the Third to complete the destruction of Enclave forces in California. The Fourth would be redeployed to the Mojave against Caesar’s Legion, serving as the garrison for Camp McCarren. It wouldn’t fight the Legion too much, mainly taking out Legion patrols and providing fire support to nearby NCR outposts. It would, however, be the unit tasked with eliminating the Fiends and working with the Kings, as well as the Followers of the Apocalypse. The result of this was that the Fourth Infantry became incredibly popular in Freeside and many of its more recent recruits hail from the slums around New Vegas.
5th Infantry Regiment
The Fifth Infantry Regiment was formed in 2240 at the start of the Enclave War to reinforce the NCR Army. As a green regiment, however, it was sent to the north to fight the Khans instead of fighting at Navarro in 2241. It did win glory in the NCR-Brotherhood War, supporting the Third in the capture of Helios One and, later, would serve as the garrison of Mojave Outpost. During the NCR-Legion War, the Fifth Infantry would often find itself scattered across the Mojave, defending Primm and hunting down escaped Powder Gangers. As a result, it had one of the highest casualty rates against the Legion during the entire campaign.
6th Infantry Regiment
The Sixth Infantry Regiment was formed in 2240 to reinforce the NCR Army during the Enclave War. However, it missed out on the Enclave War and wouldn’t see major action until the NCR-Brotherhood War, where it fought to defend Redding against Brotherhood attacks. The Sixth would later take part in the Bitter Springs Massacre before being returned to Redding to defend against tribals in Idaho.
7th Infantry Regiment
The 7th Infantry Regiment was formed in 2241 shortly after the destruction of Navarro. Initially authorized to reinforce the NCR Army against the Enclave, it found itself repurposed to protect the NCRs southern border in Baja California. It would miss out on both the NCR-Brotherhood War and the NCR-Legion War, primarily skirmishing with chem-cartels in Baja California and fending off mutated sea-life.
8th Infantry Regiment
The 8th Infantry Regiment was formed in 2241 shortly after the destruction of Navarro. Like the 7th, it was initially formed to reinforce the NCR against the Enclave but was, instead, sent to Baja California to secure the NCR’s southern border. It missed out on the NCR-Brotherhood War and NCR-Legion War, fighting only a handful of skirmishes with chem dealers and the occasional deathclaw.
9th Infantry Regiment
The 9th Infantry Regiment was formed as part of a major military buildup in 2245, during the leadup to the NCR-Brotherhood War. It would see significant action against the Brotherhood and, later, the Legion in Nevada and Arizona, serving at the Battle of New Reno, Battle of Redding, and both Battles of Hoover Dam. In more recent years, however, it has shifted into reserve status with its headquarters in Fresno.
10th Infantry Regiment (Mountain)
11th Infantry Regiment (Airborne)
12th Infantry Regiment (Mounted)
13th Infantry Regiment (Power Armored)
14th Infantry Regiment (Power Armored)
15th Infantry Regiment
16th Infantry Regiment (Power Armored)
17th Infantry Regiment (Airborne)
18th Infantry Regiment
19th Infantry Regiment
20th Infantry Regiment (Power Armored)
21st Infantry Regiment
22nd Infantry Regiment
23rd Infantry Regiment
24th Infantry Regiment
25th Infantry Regiment
26th Infantry Regiment
27th Infantry Regiment (Power Armored)
28th Infantry Regiment
29th Infantry Regiment
30th Infantry Regiment (Power Armored)
1st Ranger Battalion (Power Armored
2nd Ranger Battalion (Power Armored)
3rd Ranger Battalion (Power Armored)
4th Ranger Battalion (Power Armored)
5th Ranger Battalion (Power Armored)
6th Ranger Battalion (Power Armored)
7th Ranger Battalion (Mounted)
8th Ranger Battalion (Mountain)
9th Ranger Battalion (Airborne)
10th Ranger Battalion (Airborne)
11th Ranger Battalion
12th Ranger Battalion
13th Ranger Battalion
14th Ranger Battalion
15th Ranger Battalion
16th Ranger Battalion
17th Ranger Battalion
18th Ranger Battalion
19th Ranger Battalion
20th Ranger Battalion
21st Ranger Battalion
22nd Ranger Battalion
23rd Ranger Battalion
24th Ranger Battalion
25th Ranger Battalion
26th Ranger Battalion
27th Ranger Battalion
28th Ranger Battalion
29th Ranger Battalion
30th Ranger Battalion