[2] During the French and Indian War, Jacobs led Lenape warriors against British colonial settlements in multiple raids following Braddock's defeat throughout the valleys of Central Pennsylvania.
"[2] Jacobs led warriors during the Great Cove massacre in November 1755,[3]: 597–99 and raided Fort McCord in April 1756, burning it to the ground and taking 27 civilian captives.
Three days later, at the Battle of Sideling Hill, his warriors defeated a company of Pennsylvania militia that was sent to rescue the captives, killing their commanding officer.
[5] On the morning of September 8, 1756, Colonel John Armstrong Sr. led a force of 307 Pennsylvanians provincials to attack the Lenape village of Kittanning in hopes of disrupting raids against frontier settlements.
[9] In January 1758 Pennsylvania proprietor Thomas Penn wrote to Richard Peters mentioning the Kittanning Expedition, and adding that "I also received...the scalp of Captain Jacobs for which I am greatly obliged to Colonel Armstrong to whom it's a valuable trophy.