The 1759 Battle of the Plains of Abraham, in which General Wolfe’s British invasion force defeated General Montcalm’s defending army, is the most famous battle in Canadian history. After the British also conquered Montreal the following year, New France became history and a new British colony in Canada was born.
Thousands of people took part in these events. British historians say that the fleet that sailed up the St. Lawrence River in the spring of 1759 carried between 10,000 and 12,500 British sailors and soldiers, while the book Combattre pour la France en Amérique lists 7,450 French soldiers.
Finding out whether your ancestor fought in this campaign is not easy, but the PDF attached below, Finding British Regiments in Quebec, 1759-1760, may help you make a start. This compilation lists the British regiments that fought at Quebec City and Montreal, and it identifies the places British regiments were posted during the 1759-1760 campaign.
The Canadian government website of The National Battlefields Commission www.ccbn-nbc.gc.ca/en/ describes the historical context of the Seven Years War (also known as the French and Indian War), while the searchable page www.ccbn-nbc.gc.ca/en/history-heritage/battles-1759-1760/soldiers/ lists the names of 7,279 British soldiers and 4,079 French soldiers who took part.
Marcel Fournier and a staff of about 30 researchers in Montreal and France identified 7,450 soldiers and officers who fought for France in New France, plus the names of another 1374 soldiers. These findings were published in Combattre pour la France en Amérique by La Société généalogique canadienne-française, Montreal, 2009 (in French only).
If you are interested in the soldiers who fought in British regiments, you should consult the two-volume In Search of the “Forlorn Hope”: a Comprehensive Guide to Locating British Regiments & Their Records (1640-WWI) by John M. Kitzmiller II, published in Salt Lake City by Manuscript Publishing Foundation, 1988. You will probably find it in a large library. This book is the source of the information complied here.
These two volumes, plus a supplement, tell you which regiment was posted where from 1640 to 1914. The book does this in reverse: you need to look up the name of a place or campaign and the book identifies the regiments stationed there. The supplement can also help you with genealogical research you might want to conduct in British War Office Records. Once you find your ancestor’s name, you may need to visit the Public Record Office, Kew, near London.
Another book, My Ancestor was in the British Army, by Michael Watts and Christopher Watts, published by the Society of Genealogists in the U.K. in 2009, lists dozens of other archives in England, Wales and Scotland in which military records are kept, including the soldiers and mariners who fought during the Seven Years War in North America. You can also try searching military records on the subscription website Find My Past, www.findmypast.com.