Question: When did the french join revolution on colonists side?
Disambiguated questions and answers: question: When did the french join revolution on colonists side by secretly shipping supplies?
When did the french join revolution on colonists side by sending military aid though a company called Rodrigue Hortalez et Compagnie?
When did the french join revolution on colonists side after signing a treaty that made Britain declare war on them?
answer: June 1775
spring of 1776
March 17, 1778
Natural Questions answer: 1778 (from the Wikipedia article "France in the American Revolutionary War")