Question: What did the war that is the main subject of Soldier Five inadvertently do in the early 1900s?

full_context: Document 1: 1973 oil crisis: The USSR's invasion of Afghanistan was only one sign of insecurity in the region, also marked by increased American weapons sales, technology, and outright military presence. Saudi Arabia and Iran became increasingly dependent on American security assurances to manage both external and internal threats, including increased military competition between them over increased oil revenues. Both states were competing for preeminence in the Persian Gulf and using increased revenues to fund expanded militaries. By 1979, Saudi arms purchases from the US exceeded five times Israel's. Another motive for the large scale purchase of arms from the US by Saudi Arabia was the failure of the Shah during January 1979 to maintain control of Iran, a non-Arabic but largely Shiite Muslim nation, which fell to a theocratic Islamist government under the Ayatollah Ruhollah Khomeini in the wake of the 1979 Iranian Revolution. Saudi Arabia, on the other hand, is an Arab, largely Sunni Muslim nation headed by a near absolutist monarchy. In the wake of the Iranian revolution the Saudis were forced to deal with the prospect of internal destabilization via the radicalism of Islamism, a reality which would quickly be revealed in the seizure of the Grand Mosque in Mecca by Wahhabi extremists during November 1979 and a Shiite revolt in the oil rich Al-Hasa region of Saudi Arabia in December of the same year. In November 2010, Wikileaks leaked confidential diplomatic cables pertaining to the United States and its allies which revealed that the late Saudi King Abdullah urged the United States to attack Iran in order to destroy its potential nuclear weapons program, describing Iran as "a snake whose head should be cut off without any procrastination."
Document 2: Islamism: In 1979, the Soviet Union deployed its 40th Army into Afghanistan, attempting to suppress an Islamic rebellion against an allied Marxist regime in the Afghan Civil War. The conflict, pitting indigenous impoverished Muslims (mujahideen) against an anti-religious superpower, galvanized thousands of Muslims around the world to send aid and sometimes to go themselves to fight for their faith. Leading this pan-Islamic effort was Palestinian sheikh Abdullah Yusuf Azzam. While the military effectiveness of these "Afghan Arabs" was marginal, an estimated 16,000 to 35,000 Muslim volunteers came from around the world came to fight in Afghanistan.
Document 3: Soldier Five: Soldier Five – The Real Truth About the Bravo Two Zero Mission is the third book about the Bravo Two Zero mission during the Gulf War to have been written by a member of the eight-man patrol involved.
Document 4: Bravo Two Zero (film): Bravo Two Zero is a 1999 two-hour television miniseries (broadcast in two parts between 3 and 4 January in the UK), based on the book of the same name by Andy McNab. The film covers real life events – from the perspective of Andy McNab, patrol commander of Bravo Two Zero, a British SAS patrol, tasked to find Iraqi Scud missile launchers during the Gulf War in 1991. The names of the patrol members killed were changed.
Document 5: Brotherhood of War: The Brotherhood of War is a series of novels written by W. E. B. Griffin, about the United States Army from the Second World War through the Vietnam War. The story centers on the careers of four U.S. Army officers who became lieutenants in the closing stages of World War II and the late 1940s. The series is notable for the amount of attention it "does not" devote to combat. Rather than skipping forward, it follows the main characters though their peacetime service as the army evolves in the 1940s, 1950s and 1960s, particularly in the development of Army Aviation and Special Forces.
Document 6: Islamism: After al-Nimeiry was overthrown in 1985 the party did poorly in national elections, but in 1989 it was able to overthrow the elected post-al-Nimeiry government with the help of the military. Turabi was noted for proclaiming his support for the democratic process and a liberal government before coming to power, but strict application of sharia law, torture and mass imprisonment of the opposition, and an intensification of the long-running war in southern Sudan, once in power. The NIF regime also harbored Osama bin Laden for a time (before 9/11), and worked to unify Islamist opposition to the American attack on Iraq in the 1991 Gulf War.
Document 7: Douglas A. Zembiec: Major Douglas Alexander Zembiec (April 14, 1973 – May 11, 2007), the "Lion of Fallujah" and also referred to as the "Unapologetic Warrior" was an officer in the United States Marine Corps and member of the CIA's Special Activities Division's Ground Branch who was killed in action while serving in Operation Iraqi Freedom. He is best known for his actions during Operation Vigilant Resolve, which were detailed in the book "No True Glory: A Front-line Account of the Battle of Fallujah" by Bing West and for an article that ran in the "Wall Street Journal" following his death.
Document 8: Islamism: Another factor in the early 1990s that worked to radicalize the Islamist movement was the Gulf War, which brought several hundred thousand US and allied non-Muslim military personnel to Saudi Arabian soil to put an end to Saddam Hussein's occupation of Kuwait. Prior to 1990 Saudi Arabia played an important role in restraining the many Islamist groups that received its aid. But when Saddam, secularist and Ba'athist dictator of neighboring Iraq, attacked Saudi Arabia (his enemy in the war), western troops came to protect the Saudi monarchy. Islamists accused the Saudi regime of being a puppet of the west.
Document 9: Islamism: These attacks resonated with conservative Muslims and the problem did not go away with Saddam's defeat either, since American troops remained stationed in the kingdom, and a de facto cooperation with the Palestinian-Israeli peace process developed. Saudi Arabia attempted to compensate for its loss of prestige among these groups by repressing those domestic Islamists who attacked it (bin Laden being a prime example), and increasing aid to Islamic groups (Islamist madrassas around the world and even aiding some violent Islamist groups) that did not, but its pre-war influence on behalf of moderation was greatly reduced. One result of this was a campaign of attacks on government officials and tourists in Egypt, a bloody civil war in Algeria and Osama bin Laden's terror attacks climaxing in the 9/11 attack.
Document 10: Islamism: Another major division within Islamism is between what Graham E. Fuller has described as the fundamentalist "guardians of the tradition" (Salafis, such as those in the Wahhabi movement) and the "vanguard of change and Islamic reform" centered around the Muslim Brotherhood. Olivier Roy argues that "Sunni pan-Islamism underwent a remarkable shift in the second half of the 20th century" when the Muslim Brotherhood movement and its focus on Islamisation of pan-Arabism was eclipsed by the Salafi movement with its emphasis on "sharia rather than the building of Islamic institutions," and rejection of Shia Islam. Following the Arab Spring, Roy has described Islamism as "increasingly interdependent" with democracy in much of the Arab Muslim world, such that "neither can now survive without the other." While Islamist political culture itself may not be democratic, Islamists need democratic elections to maintain their legitimacy. At the same time, their popularity is such that no government can call itself democratic that excludes mainstream Islamist groups.
Document 11: The Good Soldiers: The Good Soldiers (2009) is a non-fiction book about the 2007 troop surge in Iraq written by David Finkel, chronicling the deployment of 2nd Battalion, 16th Infantry Regiment of the 4th Infantry Brigade Combat Team, 1st Infantry Division, nicknamed "Rangers", under the command of Lieutenant Colonel Ralph Kauzlarich. The story follows Kauzlarich as he experiences the reality of war, and loses soldiers for the first time.
Document 12: The Things They Carried: The Things They Carried (1990) is a collection of linked short stories by American novelist Tim O'Brien, about a platoon of American soldiers fighting on the ground in the Vietnam War. His third book about the war, it is based upon his experiences as a soldier in the 23rd Infantry Division.
Document 13: Islamism: An Islamist movement influenced by Salafism and the jihad in Afghanistan, as well as the Muslim Brotherhood, was the FIS or Front Islamique de Salut (the Islamic Salvation Front) in Algeria. Founded as a broad Islamist coalition in 1989 it was led by Abbassi Madani, and a charismatic Islamist young preacher, Ali Belhadj. Taking advantage of economic failure and unpopular social liberalization and secularization by the ruling leftist-nationalist FLN government, it used its preaching to advocate the establishment of a legal system following Sharia law, economic liberalization and development program, education in Arabic rather than French, and gender segregation, with women staying home to alleviate the high rate of unemployment among young Algerian men. The FIS won sweeping victories in local elections and it was going to win national elections in 1991 when voting was canceled by a military coup d'état.
Document 14: Black Hawk Down (book): Black Hawk Down: A Story of Modern War is a 1999 book by journalist Mark Bowden. It documents efforts by the Unified Task Force to capture Somali faction leader Mohamed Farrah Aidid in 1993, and the resulting battle in Mogadishu between United States forces and Aidid's militia. One of the key events is the downing of two United States UH-60 Black Hawk helicopters, from which the book derives its title, and the attempt to rescue their crews. United States forces included Army Rangers, 160th Special Operations Aviation Regiment, 10th Mountain Division, Delta Force and Navy SEALs, with United Nations peacekeeping forces also involved.
Document 15: War on Terror: On 14 September 2009, U.S. Special Forces killed two men and wounded and captured two others near the Somali village of Baarawe. Witnesses claim that helicopters used for the operation launched from French-flagged warships, but that could not be confirmed. A Somali-based al-Qaida affiliated group, the Al-Shabaab, has confirmed the death of "sheik commander" Saleh Ali Saleh Nabhan along with an unspecified number of militants. Nabhan, a Kenyan, was wanted in connection with the 2002 Mombasa attacks.
ground_truth: radicalize the Islamist movement
sub_queries: Soldier Five >> main subject Answer: Gulf War
What did Gulf War inadvertently do in the early 1990s? Answer: radicalize the Islamist movement