James Mackay was a captain

Captain (British Army and Royal Marines)

Captain is a junior officer rank of the British Army and Royal Marines. It ranks above Lieutenant and below Major and has a NATO ranking code of OF-2. The rank is equivalent to a Lieutenant in the Royal Navy and to a Flight Lieutenant in the Royal Air Force...

 in the British Army

British Army

The British Army is the land warfare branch of Her Majesty's Armed Forces in the United Kingdom. It came into being with the unification of the Kingdom of England and Scotland into the Kingdom of Great Britain in 1707. The new British Army incorporated Regiments that had already existed in England...

 during the French and Indian War

French and Indian War

The French and Indian War is the common American name for the war between Great Britain and France in North America from 1754 to 1763. In 1756, the war erupted into the world-wide conflict known as the Seven Years' War and thus came to be regarded as the North American theater of that war...

. He was in command of the Independent Company of South Carolina when he was sent by the Governor of South Carolina to assist Virginia's defense of the Ohio Country

Ohio Country

The Ohio Country was the name used in the 18th century for the regions of North America west of the Appalachian Mountains and in the region of the upper Ohio River south of Lake Erie...

 from the French in the summer of 1754. He was co-commander of Fort Necessity along with George Washington during the Battle of the Great Meadows

Battle of the Great Meadows

The Battle of Fort Necessity, or the Battle of the Great Meadows took place on July 3, 1754 in what is now the mountaintop hamlet of Farmington in Fayette County, Pennsylvania. The engagement was one of the first battles of the French and Indian War and George Washington's only military surrender...

on July 3, 1754.