9th Engineer Battalion (United States) - Lineage

Lineage

Constituted 1917-05-15 in the Regular Army as the 2d Battalion, Mounted Engineers Organized 1917-05-21 at Camp Newton D. Baker, Texas Reorganized and redesignated in July 1917 as the 9th Engineers Assigned 1917-11-27 to the 15th Cavalry Division

• Relieved 1919-05-22 from assignment to the 15th Cavalry Division
• Battalion (less Company A) inactivated 1922-10-01 at Fort Sam Houston, Texas
• Assigned 1923-03-24 to the 2nd Cavalry Division
• Company A inactivated 1930-04-19 at Fort Riley, Kansas
• Activated 1941-11-01 at Fort Riley, Kansas
• Reorganized and redesignated 1942-07-15 as the 9th Armored Engineer Battalion; concurrently relieved from assignment to the 2d Cavalry Division and assigned to the 9th Armored Division.
• Deployed from the New York Port of Embarkation on 1944-08-20.
• Arrived in England on 1944-08-26, and prepared for entrance into combat.
• Arrived in France on 1944-10-06, and immediately participated in the Rhineland Campaign.
• The 9th Engineer Battalion was withdrawn from the Rhineland Campaign and redirected to the Ardennes-Alsace Campaign on 1944-12-16.
• The Ardennes-Alsace Campaign was concluded on 1945-01-25, and the 9th Engineer Battalion returned to the Rhineland Campaign.
• The Rhineland Campaign concluded on 1945-03-21.
• The Central Europe Campaign commenced on 1945-03-22.
• The Central Europe Campaign concluded on 1945-05-11, and the 9th Engineer Battalion transitioned to Occupation mode.
• The 9th Engineer Battalion was located at Bayreuth, Germany on 1945-08-14.
• 9th EB returned to the Hampton Roads Port of Embarkation on 1945-10-12, and moved to Camp Patrick Henry.
• Inactivated 1945-10-13 at Camp Patrick Henry, Virginia
• Redesignated 1951-12-17 as the 9th Engineer Combat Battalion and relieved from assignment to the 9th Armored Division
• Activated 1952-01-21 at Fort Lewis, Washington
• Redesignated 1953-06-10 as the 9th Engineer Battalion
• Assigned 1991-10-16 to the 3d Infantry Division.
• Inactivated 1992-08-15 in Germany and relieved from assignment to the 3d Infantry Division
• Assigned 1996-02-16 to the 1st Infantry Division and activated in Schweinfurt, Germany
• Assigned 2008-03-15 to the 172nd Infantry Brigade Combat Team in Schweinfurt, Germany