Question: Where is the 181st Infantry Brigade's headquarters in Rock Island Arsenal located in the U.S?

full_context: Document 1: 181st Infantry Brigade (United States): The 181st Infantry Brigade is an infantry brigade of the United States Army based at Fort McCoy, Wisconsin. As an Active Component/Reserve Component (AC/RC) brigade, the unit serves primarily in a training role for other units of the US armed forces. The brigade is subordinate to the First United States Army, headquartered at Rock Island Arsenal, Illinois. It has six prime components.
Document 2: 198th Infantry Brigade (United States): The 198th Infantry Brigade, was first formed as part of the United States Army Reserve's 99th Division. It was active from 1967 through 1971 and has been active since 2007 as an Infantry Training Brigade as part of the US Army Infantry School at Fort Benning, Georgia.
Document 3: Watervliet Arsenal: The Watervliet Arsenal is an arsenal of the United States Army located in Watervliet, New York, on the west bank of the Hudson River. It is the oldest continuously active arsenal in the United States, and today produces much of the artillery for the army, as well as gun tubes for cannons, mortars, and tanks. It has been a National Historic Landmark since 1966.
Document 4: Headquarters Company 1-181 Infantry: Headquarters Company 1-181 Infantry, Worcester, MA, is the command element for the 1st Battalion 181st Infantry Regiment of the Massachusetts Army National Guard. In the National Guard, companies sometimes have two histories. They share the history of the regiment to which they are assaigned, but also may have a unique company history and lineage. Therefore, HHC 1-181 IN shares the long history of the 181st Infantry Regiment (United States). While the 181st Infantry Regiment shares the distinction of being the oldest combat regiment in the United States Army, Headquarters Company was formed more recently during the Volunteer Militia craze of the 1890s. During this time young men began to flock to the independent militia companies forming in each town and city. These companies were both military units and social clubs. This site concentrates on the unique history of HHC as a militia / National Guard company in Worcester., MA. Headquarters Company (Wellington Rifles) has gone on to serve in the following conflicts: Spanish–American War, Mexican Border Campaign, World War I and World War II. Most recently the company served in Iraq, in New Orleans following Hurricane Katrina, and in Afghanistan.
Document 5: Rock Island Arsenal: The Rock Island Arsenal comprises 946 acres , located on Arsenal Island, originally known as Rock Island, on the Mississippi River between the cities of Davenport, Iowa, and Rock Island, Illinois. It lies within the state of Illinois. It is home of First Army headquarters. The island was originally established as a government site in 1816, with the building of Fort Armstrong. It is now the largest government-owned weapons manufacturing arsenal in the United States. It has manufactured military equipment and ordnance since the 1880s. In 1919–1920 one hundred of the Anglo-American or Liberty Mark VIII tanks were manufactured, although too late for World War I. It is designated as a National Historic Landmark.
Document 6: 166th Aviation Brigade (United States): The 166th Aviation Brigade was an aviation training brigade of the United States Army headquartered at Fort Hood, Texas. It was a subordinate unit of First Army - Division West. An "AC/RC" (Active Component / Reserve Component) formation, the 166th Aviation Brigade was the sole organization responsible for the post-mobilization training of United States Army Reserve & National Guard aviation units. The unit was formerly designated as 3rd Brigade, 75th Division.
Document 7: 181st Infantry Regiment (United States): The 181st Infantry Regiment shares the distinction of being the oldest combat regiment in the United States Army. The regiment traces its history to 13 December 1636, when it was one of four colonial regiments of foot of the British Crown in Massachusetts. It later 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 War with Spain, Mexican Border Campaign, World War I and World War II. Most recently the 1st Battalion, 181st Infantry has served in Iraq, in New Orleans following Hurricane Katrina, and in Afghanistan. The only active element of the regiment is the 1st Battalion, 181st Infantry Regiment, which returned from a year of service in Afghanistan in July 2011. The 1st Battalion was mobilized in March 2017 for one year of service with the Multinational Force & Observers in the Sinai Peninsula of Egypt.
Document 8: 81st Armor Regiment: The 81st Armor Regiment currently has two active battalions, the 1st and 3rd, both of which are assigned to the 194th Armor Brigade, US Army Armor Center, Fort Benning, GA. They are responsible for training enlisted armor crewmen for the US Army and US Marines on armored warfare vehicles such as the M1A1/M1A2 and Stryker platform.
Document 9: Lock and Dam No. 15: Lock and Dam No. 15 is a lock and dam located on the Upper Mississippi River. It spans the river between Rock Island, Illinois and Davenport, Iowa. Lock and Dam 15 is the largest roller dam in the world, its dam is 1203 ft long and consists of nine 109 ft non-submersible, non-overflow roller gates and two 109 ft non-submersible overflow roller gates. It is unusual among the upper Mississippi River dams in that it has only roller gates, has different sizes and types of roller gates, it is not perpendicular to the flow of the river and is one of the few facilities that has a completed auxiliary lock. The main lock is 110 ft wide by 600 ft long and its auxiliary lock is 110 ft wide by 360 ft long. In 2004, the facility was listed in the National Register of Historic Places as Lock and Dam No. 15 Historic District, #04000175 covering 3590 acre , 2 buildings, 9 structures, and 1 object.
Document 10: Savanna Army Depot: Savanna Army Depot was a 13062 acre installation, located on the eastern bank of the Mississippi River, in Carroll and Jo Daviess counties, around 7 mi north of Savanna, Illinois. It was opened in 1917 as a proving and testing facility for weapons developed at Rock Island Arsenal. In 1921 it became a weapons depot. The U.S. Environmental Protection Agency (EPA) listed the depot as a Superfund site in 1989. The depot was selected for closure through the Base Realignment and Closure process in July 1995 and was officially closed on March 18, 2000. The Jo-Carroll Local Redevelopment Authority (LRA) was established to redevelop a portion of the property for commercial and business usage referred to as the Savanna Depot Park. On September 26, 2003, the United States Department of Defense agreed to transfer 9404 acre of land to become the Lost Mound Unit of the Upper Mississippi River National Wildlife and Fish Refuge. 3022 acre were initially transferred with the rest to be transferred following environmental cleanup. The portion near Lock and Dam No. 12 was transferred to the United States Army Corps of Engineers and a small part to the Illinois Department of Natural Resources.
Document 11: Ford Motor Company Assembly Plant: The Ford Richmond Plant, formally the Ford Motor Company Assembly Plant, in Richmond, California, was the largest assembly plant to be built on the West Coast and its conversion to wartime production during World War II aided the United States' war effort. The plant is part of the Rosie the Riveter/World War II Home Front National Historical Park and is listed on the National Register of Historic Places. It currently houses the National Park Service visitor center, several private businesses and the Craneway Pavilion, an event venue.
Document 12: 1181st Forward Support Company: The 1181st Forward Support Company is the forward support company (FSC) for the 1st Battalion, 181st Infantry Regiment. It provides transportation, maintenance and logistical support to the battalion operations. In the National Guard, companies sometimes have two histories. They share the history of the regiment to which they are assigned, but also have a unique company history and lineage. The 1181st FSC, for example, shares the history of the 181st Infantry Regiment. The company traces its history to the end of the Revolutionary War when it was first mustered as the 5th company of the 8th Regiment of Massachusetts Militia. It saw action in the Civil War as part of the 15th Massachusetts Infantry. It later served during the Spanish–American War, Mexican Border Campaign, World War I and World War II.
Document 13: 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.
Document 14: Red River Army Depot: The Red River Army Depot (RRAD) is an 15835 acre facility located 18 mi west of Texarkana, Texas, in Bowie County. The facility has over 3000000 sqft of storage capacity. RRAD was activated in 1941 to create an ammunition storage facility. The depot was supposed to be deactivated after the findings of the 1995 Base Realignment and Closure Commission. However, the depot remained open after the commission changed its mind. The depot was once again slated for closure upon recommendation from the 2005 BRAC commission, but has remained open to provide maintenance support for the army. The depot's primary mission is the maintenance and repair of all tactical wheeled vehicles, which includes repairing MRAPs and HUMVEEs. Letterkenny Army Depot took over some of RRAD's missile systems.
Document 15: Joliet Army Ammunition Plant: Joliet Army Ammunition Plant (JOAAP, formerly known as the Joliet Arsenal) was a United States Army arsenal located in Will County, Illinois, near Elwood, Illinois, south of Joliet, Illinois. Opened in 1940 during World War II, the facility consisted of the Elwood Ordnance Plant (EOP) and the Kankakee Ordnance Works (KNK). In 1945, the two were deactivated and combined forming the Joliet Arsenal. The plant was reactivated for the Korean War and renamed Joliet Army Ammunition Plant during the Vietnam War. Production of TNT ended in 1976, and the major plant operations closed shortly after in the late 1970s. The facility briefly revived an automated load-assemble-pack (LAP) artillery shell operation that was managed by the Honeywell Corporation during the Reagan administration in the 1980s before it was finally closed.
ground_truth: Illinois