The Battle of Fort Beausejour occurred between June 3 and June 16, 1755. It was one of the first battles of the French and Indian War.

2,000 British soldiers under the command of Robert Mockton besieged the fort on June 3. British forces hoped to capture Fort Beausejour to gain control of the nearbly Isthmus of Chignecto, which connects the peninsula of Nova Scotia with the rest of North America. French defensive forces, numbering only 162, withstood the siege and bombardment for thirteen days before surrendering on June 16.