Lord Anglesey was previously married to Lady Caroline Elizabeth Villiers (1774 - 1835), daughter of George Villiers, 4th Earl of Jersey and Frances Villiers, Countess of Jersey. They had eight children.
Soon after their divorce in 1810, he married Lady Charlotte Cadogan, daughter of Charles Sloane Cadogan, 1st Earl Cadogan and Mary Churchill. (She had recently been married to Henry Wellesley, younger brother of Arthur Wellesley, 1st Duke of Wellington.) They had 10 children, of whom 6 survived infancy. George was the fifth child (born 1818).
At the age of 25, Henry Paget had raised a battalion of volunteers (chiefly from the tenants of his father's Staffordshire estates) which eventually became the 80th Foot, and led them (as a temporary Lieut-Colonel) in the Duke of York's forces on the Continent in 1793.
By 1797 he had, with the connivance of his father and the Commander in Chief, Lord Amherst (and a series of paper-only transactions), managed to obtain the full commission of a Lieutenant-Colonel and was given the command of the 7th Hussars. He remained connected with them for forty-five years.
He commanded the 7th Hussars during the first part of the campaign in the Peninsula, but, following the retreat from Corunna (1809), the regiment did not go back to Spain until 1811. According to widespread rumour, this was the result of his affair with Wellington's sister-in-law, but more likely because of his seniority to Wellington.
Although still Colonel of the regiment, he did not take active command, and was on half-pay until he, as a Major-General, was given the command of all the cavalry and horse-artillery under Wellington's command at Waterloo.
In the final stages of the battle he received a grape-shot wound which caused his leg to be subsequently amputated, From now on, in the regiment as elsewhere, he was dubbed, "One-Leg".
Besides being created the 1st Marquess of Anglesey (1815) and 2nd Earl of Uxbridge [date?], he was a Field-Marshal in the Army, Colonel of the Royal Horse Guards, K.G., G.C.B., G.C.H., Lord Lieutenant and Custos Rotalorum [Keeper of the Rolls] of the counties of Anglesey and Staffordshire, Constable of the Castle of Caernarvon, Ranger of Snowdon Forest and Captain of Cowes Castle. He was also twice Lord-Lieutenant of Ireland and twice Master-General of Ordnance.
[PB: For some other sources, see e.g. http://en.wikipedia.org/wiki/Henry_Paget,_1st_Marquess_of_Anglesey.]