My 2nd British Regiment of Foot are the 18th, Royal Irish.
Short regimental AWI History from Drums and Colours.
The 18th Regiment of Foot arrived in Philadelphia in July of 1767.
In May of 1768, the regiment was sent west to replace the 34th Foot
in garrison at Fort Pitt. The 18th Foot continued to garrison the frontier of the ’Illinois Country’ until the outbreak of the American Revolution.
The regiment took part in the fighting at Lexington and Concord on
April 19, 1775, and at the Battle of Bunker Hill on June 17, 1775.
In July of 1776, the men of the 18th Foot were drafted into
other regiments while the officers returned to England.
The 18th Regiment of Foot was reformed at Dover Castle in 1777.