There is a wealth of information on this subject, and you could do a lot worse than trawling through David Stewart of Garth's Sketches, as they give both the official regimental view of events and engagements, as well as personal first-hand accounts. He is often quoted.

Garth himself was an experienced officer, and seems happy to criticise officialdom when it is deserved.

One such is the withrawal of the broadsword for the Highlander, at a time when it was proving both a favourite with the individual Highland soldier and useful in the kind of warfare seen in North America.

You will find that some regiments were only short-lived, being raised for colonial service and disbanded after only a few years. But the 42nd (Black Watch) may be worth singling out for more detailed study.