United Empire Loyalists
The United Empire Loyalists played a prominent role in the development of this country. In particular, the officers and men of the Royal Highland Emigrants, the King's Royal Regiment of New York, the Loyal Rangers and the King's Rangers, displayed unswerving fidelity in defence of the city and province of Québec during the American War of Independence (1775-83). In later years, they subdued the wilderness to create new homes and to lay the foundations of the province of Upper Canada.
Plaque via Alan L. Brown's site Ontario Plaques. Full page here.