In 1775, Justus signed the Articles of Confederation at New Paltz, NY (near present day Poughkeepsie). He served during the Revolutionary War under Col. Levi Pawling's Regiment of the New York Militia. Two signatures show his name spelled as Justus Hubbell.

One of his military records shows:
Justis Huble, Day of Inlistment, Do (e.g., ditto, July' 29), Days of work. Do (e.g., 30), Age 32, Where Born Connecticut, Occupation Yeoman, Statute, Feet 5, Inches 11 1/2, Complection Fair, Eyes Blew [sic], Hair Sandy

After the war, he settled near Chilhowie with his family. Family notes indicate that he suffered from rheumatism and that his wife, Waitstill, helped finish the family home. It is no longer in existence, but was located near the cemetery at the Primitive Baptist Church.

His will is recorded in Washington County, Virginia Will Book A & B 1780-1814, pp. 202-3. His estate inventory was taken on May 2, 1796 and settled on April 11, 1810. Thomas Tilson was executor (findagrave.com)