 In 1808, as an Ensign in the 87th Foot, he purchased a Lieutenancy in the 83rd Foot.He served in the Peninsular War, where he was wounded four times, and by the end of that conflict was a decorated Captain and the Aide-de-camp to General Thomas Picton.From 1820 to 1826, when he exchanged from the 50th Foot to half-pay, Baldwin served as a Brigade-Major in Britain and the West Indies.