Question: Only the Brave is a movie about a unit in what branch of the military?

full_context: Document 1: 65th Infantry Regiment (United States): The 65th Infantry Regiment, nicknamed "The Borinqueneers" from the original Taíno name of the island (Borinquen), is a Puerto Rican regiment of the United States Army. The regiment's motto is "Honor et Fidelitas", Latin for "Honor and Fidelity". The Army Appropriation Bill created by an act of Congress on 2 March 1898, authorized the creation of the first body of native troops in Puerto Rico. On 30 June 1901, the "Porto Rico Provisional Regiment of Infantry" was organized. On July 1, 1908, Congress incorporated the regiment into the Regular Army as the Puerto Rico Regiment of Infantry, United States Army. On May 14, 1917, the Regiment was activated and additional men were assigned, with the unit being sent to serve at Panama. On June 4, 1920, the Regiment was renamed 65th Infantry. During World War II, the Regiment saw action throughout Europe, especially France and Germany, participating in Naples-Foggia, Rome-Arno and Rhin. Several Purple Hearts were handed posthumously to members of the 65th Regiment, and the Medal of Honor was granted to Capt. Eurípides Rubio, Héctor Santiago, Carlos Lozada and Fernando García.
Document 2: 503rd Infantry Regiment (United States): The 503rd Infantry Regiment, formerly the 503rd Parachute Infantry Regiment (PIR) and the 503rd Airborne Infantry Regiment (AIR), is an airborne infantry regiment of the United States Army. The regiment served as an independent regiment in the Pacific War during World War II; at Fort Campbell, Kentucky; in Okinawa, Japan; and in Germany. Regimental elements have been assigned to the 2nd Infantry Division, the 11th Airborne Division, the 24th Infantry Division, the 82nd Airborne Division, and the 173rd Airborne Brigade Combat Team. Regimental elements have participated in campaigns in the Vietnam War, Operation Enduring Freedom–Afghanistan, and Operation Iraqi Freedom. The regiment claims 15 Medal of Honor recipients: two from World War II, 10 from Vietnam, and three from Afghanistan. A parent regiment under the U.S. Army Regimental System. The regiment's 1st and 2nd Battalions are active, assigned to the 173rd Airborne Brigade, based at Caserma Ederle, Vicenza, Italy.
Document 3: Hawaii Territorial Guard: The Hawaii Territorial Guard was the state defense force of Hawaii during World War II. As a result of the National Guard of Hawaii being federalized for the duration of the war, the Hawaii Territorial Guard was created to serve as the stateside replacement for the National Guard. During the war, it was the sole military force available to the Governor of Hawaii to use in defense of the state. Unlike the National Guard, as a state defense force, the Hawaii Territorial Guard was not subject to federalization or deployment outside of the borders of Hawaii, but rather answered only to the governor.
Document 4: 3rd Battalion, 3rd Marines: 3rd Battalion, 3rd Marines, abbreviated as (3/3), is an infantry battalion of the United States Marine Corps, based out of Kāne'ohe, Hawai'i. Known as either "Trinity" or "America's Battalion", the unit falls under the command of the 3rd Marine Regiment of the 3rd Marine Division. The unit consists of approximately 1124 U.S. Marines and United States Navy sailors. Like most battalions of the U.S. Marine Corps, 3rd Battalion, 3rd Marines is made up of three rifle companies (India, Kilo, and Lima), a Headquarters and Services (H&S) company, and a weapons company. The battalion was originally formed at Marine Corps Base Camp Lejeune, North Carolina in 1942 and saw action on both Bougainville and Guam during World War II, where it was awarded the first of its Presidential Unit Citations for "gallantry, determination, and esprit de corps in accomplishing its mission under extremely difficult and hazardous conditions"; and the first of its Navy Unit Commendations for "outstanding service". Marines in the battalion were also awarded one Medal of Honor and seven Navy Crosses during the war. Following World War II, 3rd Battalion was disbanded until 1951, when it was reformed in California. The battalion was alerted for possible deployment during the 1956 Suez War and the 1958 intervention in Lebanon. In 1965, the Marines of 3rd Battalion were deployed to the Vietnam War and participated in Operation Starlite, the first major Marine engagement of that conflict. The battalion continued to see major action through Vietnam and was rotated back to the United States in 1969. Famous alumni from its time in Vietnam include Corporal Robert Emmett O'Malley, the first Marine in Vietnam to be awarded the Medal of Honor, Oliver North, and John Ripley. Around the end of the Vietnam War, the Battalion was deactivated for a second time in 1974.
Document 5: Only the Brave (2006 film): Only the Brave is a 2006 independent film about the 100th Infantry Battalion/442nd Regimental Combat Team, a segregated World War II fighting unit primarily made up of "Nisei" Japanese Americans, which for its size and length of service became the most decorated unit in U.S. military history. The film, produced and directed by Lane Nishikawa is a fictionalized account of the rescue of the Lost Battalion.
Document 6: 442nd Infantry Regiment (United States): The 442nd Regimental Combat Team is an infantry regiment of the United States Army, part of the Army Reserve. The regiment was a fighting unit composed almost entirely of American soldiers of Japanese ancestry (mostly from Hawaii) who fought in World War II. Most of the families of mainland Japanese Americans were confined to internment camps in the United States interior. Beginning in 1944, the regiment fought primarily in Europe during World War II, in particular Italy, southern France, and Germany.
Document 7: 204th Brigade Support Battalion (United States): The mission of the 204th Brigade Support Battalion, "Rough Riders," is to, on order, deploy and execute responsive Combat Service Support and Combat Health Support in support of the 2nd Brigade Combat Team, 4th Infantry Division's objectives. ("Rough Riders") was originally constituted as the 5th Sanitary Trains on 10 November 1917 at Camp Logan, Texas. During World War I, the unit fought in numerous battles and campaigns including the Battle of Saint-Mihiel, Meuse-Argonne Offensive, and the Battle of Champagne, at Lorraine. After the First World War, the unit was reorganized and re-designated on 29 January 1921 as the 5th Medical Regiment. The 5th Medical Regiment was inactivated in August 1921 at Camp Jackson, South Carolina.
Document 8: 100th Infantry Battalion (United States): The 100th Infantry Battalion is the only infantry unit in the United States Army Reserve. In World War II, the then-primarily Nisei battalion was composed largely of former members of the Hawaii Army National Guard. The 100th saw heavy combat during World War II before and after combining with the 442nd Infantry Regiment, another mostly Nisei military unit, into a single fighting combat team. Based at Fort Shafter, Honolulu, Hawaii, the 100th Battalion has reservists from Hawaii, American Samoa, Guam and Saipan, and has deployed to Iraq and Kuwait. The unit was unofficially nicknamed the "Purple Heart Battalion", with the motto "Remember Pearl Harbor".
Document 9: 299th Cavalry Regiment (United States): The 299th Cavalry Regiment, formerly the 299th Infantry Regiment, nicknamed the "The Koa Regiment", is a unit of the Hawaii Army National Guard. It was established in 1923 from the old 2nd Hawaiian Infantry Regiment, and it served during World War II as part of the 24th Infantry Division. The name "Koa" comes from the Hawaiian word for "Warrior", and is currently headquartered in Hilo, Hawaii. The 1st and 2nd Battalions, 299th Infantry were federally activated in 1968 to support the United States Army Pacific during the Vietnam War. More recently 2nd Battalion, 299th Infantry Regiment deployed to Iraq and again after being re-flagged in 2007 as 1st Squadron, 299th Cavalry Regiment.
Document 10: 3rd Battalion, 187th Infantry Regiment: The 3rd Battalion, 187th Infantry Regiment, also known as the Iron Rakkasans, is a battalion of the US Army 187th Infantry Regiment. The battalion was activated on 25 February 1943, and first saw action in the Pacific Theater of the Second World War, during the battle to regain US control of the Philippines. Troops from the battalion then served in the four-year occupation of Japan, where they earned their nickname "Rakkasans" (meaning "falling down umbrellas"), before stationing in Fort Campbell, Kentucky. The battalion served in the Korean War from 1950 as the 187th Airborne Regimental Combat Team and participated in 12 major missions during the Vietnam War, emerging from that conflict as the US’s most highly decorated airborne battalion. In the 1990s the battalion served in Iraq as part of Operation Desert Shield and Operation Desert Storm, then in the first decade of the 21st century in Afghanistan and again in Iraq as part of Operation Iraqi Freedom. The battalion has received numerous awards and commendations, including six Presidential Unit Citations and four Valorous Unit Awards.
Document 11: 506th Infantry Regiment (United States): The 506th Infantry Regiment, originally designated the 506th Parachute Infantry Regiment (506th PIR) during World War II, is an airborne light infantry regiment of the United States Army. Currently a parent regiment under the U.S. Army Regimental System, the regiment has two active battalions: the 1st Battalion, 506th Infantry Regiment (1-506th) is assigned to the 1st Brigade Combat Team, 101st Airborne Division, and the 2nd Battalion, 506th Infantry Regiment (2-506th) is assigned to the 3rd Brigade Combat Team, 101st Airborne Division.
Document 12: Lane Nishikawa: Lane Nishikawa is an American actor, filmmaker, playwright and performance artist. He was born in Wahiawa, Hawaii and is "Sansei" (third generation Japanese American); and his work often deals with Asian American history and identity issues. He is widely known for a series of one-man shows, including "Life in the Fast Lane", "I'm on a Mission From Buddha", "Mifune and Me" and others. In 2005 he directed the independent feature film, "Only the Brave", a fictional account of the rescue of the Lost Battalion by the 100th Infantry Battalion/442nd Regimental Combat Team, a segregated Japanese American fighting unit during World War II. Nishikawa also starred in the lead role. He has written and directed two short films about World War II veterans, "Forgotten Valor" and "When We Were Warriors".
Document 13: Susumu Ito: He was in auto mechanic school when he was drafted into the military in 1940, two years before the Japanese attack on Pearl Harbor. He worked as a mechanic, but was eventually assigned to the all Japanese-American 442nd Regimental Combat Team, which became the most decorated unit for its size and length of service in the U.S. Army during World War II. He was an artillery spotter (forward field observer) assigned to C Battery. He was promoted to the rank of second lieutenant on October 19, 1944. Ito participated in the famous rescue of the "Lost Battalion", the first battalion of the 141st U.S. Infantry Regiment of the 36th Texas Division. The action took place in the Vosges Mountains, in France, in October 1944. Both units were attached to the Seventh U.S. Army. The Lost Battalion had been cut off and surrounded by the Germans. Lt. Ito was attached to I Company of the 442, which effected the rescue of the Lost Battalion. Though the 442nd suffered extremely heavy casualties in the engagement, Ito emerged unscathed. He was attached to I Company, of which only eight members survived this action. Of the rescue, Ito later recalled, "Looking back, it wasn't an easy outing, but having come through it intact, it was an experience that cannot be forgotten or easily duplicated. At the time, I thought that this was more or less a typical battle encounter with a strong enemy and not a special or unique mission. I guess my analysis is not shared by history." The U.S. Army later declared the Rescue of the Lost Battalion to be one of the top ten battles of the U.S. Army in its history.
Document 14: 25th Infantry Division (United States): The 25th Infantry Division (nicknamed "Tropic Lightning" and the "Electric Strawberry" is a U.S. Army division based in Hawaii. The division, which was activated on 1 October 1941 in Hawaii, conducts military operations in the Asia-Pacific region. Its present deployment is composed of Stryker, light infantry, airborne, and aviation units.
Document 15: Company B 1-181 Infantry: Company B 1st Battalion 181st Infantry Regiment is a rifle company in the 1st Battalion 181st Infantry Regiment. In the National Guard, companies sometimes have two histories. They share the history of the regiment to which they are assigned, but also may have a unique company history and lineage. Therefore, Company B 1-181 IN shares the long history of the 181st Infantry Regiment (United States). This site concentrates on the unique history of Company B as a militia / National Guard company in Gardner and Greenfield (Detachment 1), MA. Company B served in the Continental Army during the American Revolution, with Union forces in the American Civil War, and as a federalized Massachusetts National Guard regiment with the U.S. Army during the Spanish–American War, Mexican Border Campaign, World War I and World War II. Most recently the Company B has served in Guantanamo Bay Cuba, in New Orleans following Hurricane Katrina, and in Afghanistan. (See below for the separate history of Detachment I in Greenfield.
ground_truth: United States Army Reserve