Montgomery secretly carried on a love affair with Catherine Mary Moore, (due to her being a woman of noble birth and he lesser so).
[1] There is some evidence[2] that they eloped and were married on board a ship bound for the American colonies in 1749.
[3][2] In 1775, he was a member of the Rowan County Committee of Safety[3] and the 3rd North Carolina Provincial Congress in 1775.
In spite of his age, Montgomery replaced Colonel Francis Locke Sr., who had taken command of the newly established 2nd Rowan County Regiment.
[3][2][6][1] Montgomery died on December 23, 1779, in Salibury, Rowan County, North Carolina,[1] leaving one son and six daughters.