Sabine was probably the son of Walter Sabine and grandson of Avery Sabine, alderman and mayor of Canterbury, who died in 1648. He joined the army at the time of the Glorious Revolution. In 1690 he married Hester Whitfield, daughter of Henry Whitfield, who, after having three sons who all died young, herself died at the age of 24.
Military career
Sabine was appointed captain lieutenant to Sir Henry Ingoldsby's regiment of foot on 8 March 1689 and became captain of the Grenadier company before 18 October 1689. He served in Ireland under William III, and was granted estates in county Kildare. On 13 July 1691, he became major of Colonel Charles Herbert's regiment. He took part in William III's campaigns in the Low Countries, during the Nine Years' War, and became lieutenant colonel on 6 July 1695 and fought at the Siege of Namur. Sabine served with the 23rd or Royal Welch Fusiliers in the War of Spanish Succession. He obtained the brevet rank of colonel on 1 January 1703. Under Marlborough he was wounded on 2 July 1704 at the battle of Schellenberg, and on 1 April following became colonel of his regiment. He commanded his Regiment at the Battle of Blenheim. He took part in the battle of Ramillies, being stationed with the fusiliers on the right of the English line. On 1 January 1707 he was promoted to the rank of brigadier-general. At the Battle of Oudenarde on 11 July 1708 he led the attack on the village of Heynam, and afterwards he took part in the Siege of Lille. On 1 January 1710 he was appointed major-general, and was given command of the Citadel at Ghent where he had to put down a mutiny in 1712. He married as his second wife Margaretta Newsham in 1711. When peace was concluded, Sabine returned with his regiment to England. In 1715 he purchased the estate of Tewin in Hertfordshire, and rebuilt the house in the following year. Then in 1716 he commanded a Brigade sent to confront the Pretender's Army at Perth. Later that year he became Commander of the British Army throughout Scotland. in May 1716. In July, the Duke of Atholl complained of ‘the conduct of General Sabine and other King’s officers, in regard to rebel prisoners and... of the plundering and other impositions made by the troops’ in Perthshire. In 1719 he was appointed Governor of Berwick and of Holy Island.