2017: 100th Division Leader Development
Effective 1 October 2017, the 100th Training Division Operations Support was redesignated as the 100th Training Division Leader Development. The 100th Training Division (LD) establishes and implements the Army Reserve Leader Development strategy to provide a continuum of career education, training, and experience for leaders in the Army Reserve. Commanding General, 100th Training Division (LD) is the Army Reserve Senior Responsible Official for Leader Development for the U.S. Army Reserve Command Commanding General.
2016: 100th Division Operations Support The 100th Division (OS) offers itself as a premier training resource for the U.S. Army. It is headquartered in Fort Knox, Kentucky, with units located across the United States. It is commanded by Brigadier General Jason Walrath.
2014: Change of Command In late 2014 the 100th Training Division's Commanding General, Brigadier General Mark Arnold, handed over command to Brigadier General Jason Walrath in a ceremony held on Brooke's Parade Field, Fort Knox, KY. 2005: BRAC - Move the 100th DIV to Fort Knox, KY In the 2005 BRAC Recommendations, DoD recommended to relocate the 100th Division headquarters to Fort Knox, KY. According to DoD, the relocation of the 100th Division to Fort Knox would support the re-engineering and streamlining of support delivered by Army Reserve training base units in order to significantly enhance training in support of mobilization and deployment. 2001: September 11, 2001 The 100th Division (IT) quickly responded to the call for volunteers following the events of September 11th. As Army National Guard units from Ohio and Kentucky mobilized at Fort Knox, a need was identified for additional cadre to assist in their in-processing, training and transportation. Approximately 20 members of various units within the 100th Division volunteered to perform up to 30 days of Active Duty Training. Working closely with the 1st Armored Training Battalion cadre, the 100th Division soldiers made sure the newly activated soldiers had the administrative and mission support needed to complete their mobilization training. 2000: Close of the M1A1 Training Era and WWII Vet Reunion
In 2000 the 100th Division took the USAR Communities of Excellence Award. Also, 2nd Bn, 399th Regiment, 7th Brigade began turn-in of their M1A1 tanks, bringing to a close the end of a training era. The division continued the training mission, but leased the equipment. The division also hosted a reunion of 100th Infantry Division veterans from WWII. 1997: Operation Future Challenge During 1997 the 100th Division played a major role in Operation Future Challenge, a Fort Knox-based Basic Camp for JROTC. Three years later, the 100th Division was solely responsible for the six-week camp. 1996: National Training Experiment In 1996 the 100th Division's 1st Brigade worked with Readiness Group Knox to pioneer the national training experiment to USAR combat units at crew and platoon levels. 1995: Reorganization and Assumption of TASS Responsibilities In 1995 the 100th Division was reorganized to include USAR Schools by taking over responsibilities for TASS, and implemented a distance learning systems approach to military career training. 1992: Basic Training at Fort Knox As a first, in 1992 the 100th Division trainers took total responsibility for three company cycles of Basic Training at Fort Knox, KY. The 100th Division established a 21st Century Division Management System to provide a direct link between commanders' quantifiable objectives and resource spending. 1991: Training for Operation Desert Storm Within 10 days after Operation Desert Storm was launched, in January 1991, two brigade task forces from the 100th Division (1,147 soldiers) were activated to go to Fort Knox, KY to train 2,000 tank crewmen and armored Cavalry scouts. 
1986: Largest USAR Unit in Kentucky In 1986 the 100th Division was considered the largest reserve unit in Kentucky, commanding 58 percent of all reservists in the state with an annual economic impact of $25 million. 1978: First USAR Unit Equipped with the M-1 Tank In 1978 the 100th Division was selected as the first Army Reserve unit to be equipped with its own M-1 tanks, and the only training division with the mission of conducting training on the M-1 Abrams tank and the M-3 Bradley Cavalry vehicle. 1971: 100th Division's First Female Soldier In 1971 Staff Sgt. Sherron Cooper became the 100th Division's first female Soldier. 1961: Mobilization during the Berlin Crisis "In 1961 President John F. Kennedy mobilized 1,500 soldiers to Fort Chaffee, Ark., during the Berlin Crisis. The 100th did the country proud by training some 32,000 soldiers after rebuilding long unused and dilapidated rifle ranges, barracks and other facilities. With the training mission accomplished, the unit was demobilized in August 1962 and returned to reserve status." 1959: Redesignated as the 100th Division for Institutional Training In 1959 the 100th Division for Replacement Training was re-designated the 100th Division for Institutional Training, one of only 12 in the nation (now reduced to seven in 2000). The mission was to teach basic, advanced individual, and common training to new Soldiers. 1946: Reactivated as the USAR 100th Airborne Division In the fall of 1946, the previously inactivated 100th Infantry Division was reactiviated as the US Army Reserve 100th Airborne Division, located in Louisville, KY. 1946: Inactivated The 100th Infantry Division was inactivated on January 26, 1946 after their return from the European Theater.
1945: Sergeant Colalillo Awarded the Medal of Honor Sergeant Mike Colalillo, C/398th Infantry Regiment, was awarded the Medal of Honor from President Truman in ceremonies at the White House in December, 1945. Sergeant Colalillo received the Medal for actions near Untergriesheim, Germany, on 7 April 1945. Photo and excerpt courtesy of: http://www.100thww2.org/
1945: Lieutenant Silk Awarded the Medal of Honor 
President Harry Truman presented the Medal of Honor to Lieutenant Silk of the 100th Infantry Division 398-E, on the grounds at the White House, 12 October 1945. Photo courtesy of: http://www.100thww2.org/
1945: Technical Sergeant Carey Posthumously Awarded the Medal of Honor Technical Sergeant Charles F. Carey, Platoon Sergeant, Anti-Tank Platoon, 2d Battalion, 397th Infantry Regiment, was killed during the 100th's tenacious defense of the village of Rimling in early January 1945, he was posthumously awarded the Medal of Honor for his leadership and personal intrepidity in stopping the attack of the 17th SS-Panzer-Grenadier Division in Operation NORDWIND. Photo and excerpt courtesy of: http://www.100thww2.org/ 1944: WWII Deployment In October of 1944 the 100th Infantry Division deployed to Europe. During their deployment they would see 185 day of uninterrupted ground combat and serve in three campaigns; the Rhineland, Central European, and Ardennes-Alsace campaigns. 1942: Founded on November 15, 1942 The 100th Infantry Division was activated on November 15, 1942, following the attacks on Pearl Harbor, and placed under the command of MG Withers A. Burress.
1921: Reorganized
100th Division was reorganized as the 100th Infantry Division in Organized Reserves with Headquarters in Charleston, West Virginia on 24 July 1982.
1918: Founded on July 23, 1918
100th Division was founded in Camp Bowie, Texas on July 23, 1918 and demobilized on November 30, 1918.