Answer:
On October 26, 1776, exactly one month to the day after being named an agent of a diplomatic commission by the Continental Congress, Benjamin Franklin sets sail from Philadelphia for France, with which he was to negotiate and secure a formal alliance and treaty.
Explanation:
https://www.history.com/this-day-in-history/benjamin-franklin-sets-sail-for-france#:~:text=On%20October%2026%2C%201776%2C%20exactly,a%20formal%20alliance%20and%20treaty.
This was Franklin's extremely important achievement, which opened the gates of the French arsenals and French support and which eventually that June also led to war between Britain and France, more or less on the timetable that the French naval building estimates had proposed
