They were then deployed in March 1918 to the Chemin des Dames area where the men had their first experience with defensive and offensive operations and with poison gas.

Regimental headquarters organized 8 June 1923 and federally recognized at New Haven, Connecticut.

The regiment, or elements thereof, were called up to perform the following state duties: riot control during a textile workers strike in Putnam, in September 1934; flood relief at Hartford from 19 March–1 April 1936; hurricane relief in the vicinity of Rockville from 22–27 September 1938.

It was inducted into federal service at home stations on 24 February 1941 and moved to Camp Blanding, Florida, where it arrived on 15 March 1941.

Company K subsequently served on Leyte Island, Philippines, and was inactivated there on 10 April 1945.

The 86th IBCT mobilized in December 2009 at Camp Atterbury, Indiana and completed a Joint Readiness Training Center rotation at Fort Polk prior to deployment in support of Operation Enduring Freedom.

As part of the 2020 Army Force Structure Realignment, the 86th IBCT – which includes the 1-102d IN – was moved in 2016 from the 42d ID to the 10th Mountain division.