Believed to have been educated at Eton College, he was commissioned as an ensign in the First Foot Guards in 1728, and promoted to captain in 1738.
[1] He saw active service during the War of the Austrian Succession, distinguishing himself at the battles of Fontenoy and Dettingen.
[4] He was promoted to the rank of colonel on 18 August 1749, and appointed as Aide-de-camp to King George II on 14 October the same year.
This constituency was controlled by his brother, Lord Falmouth, and generally returned members of the Boscawen family.
[7] Boscawen would sit for Truro until the election of 1774, when he would leave parliament to be replaced by his son George.