My 7th great grandfather apparently died September 13, 1745 due to injuries sustained during the Siege of Louisbourg in Nova Scotia, Canada.
Here is a transcription from New Hampshire from 1905 that indicates the date of death was actually September 14, 1745 and that he died from a sore throat, rather than due to injuries from serving in the military.
Here is another document verifying Jonathan (#20) did serve for the colony of New Hampshire and the footnote indicates he died September 13, 1745.
Here is a document* indicating Jonathan's widow, Tabitha (Ring) filed a petition for medical and funeral expenses as the result of her husband's death. This document also confirms his date of death was September 13, 1745.
Here is a brief synopsis of the Siege of Louisbourg of 1745.
*From "The State of New Hampshire - Provincial and State Papers 1725 - 1800 - Published by Authority of the Legislature - VOL. XVIII. - Compiled and Edited by Isaac W Hammond, A.M., Librarian New Hampshire Historical Society - "He who takes no interest in the history of his ancestors does not deserve to be remembered by his posterity" - Manchester, John B Clark, Public Printer, 1890"