Peter Margetson Wallace (1780–1864) was a career soldier in the British Army who rose to be Colonel-Commandant of the Royal Artillery and a full General.

[2] In 1797 at the age of 16, Peter became a Second Lieutenant in the Royal Artillery, an appointment into an élite corps which suggests not just ability but also influence.

Sent to the West Indies, he was aboard a merchant ship in December 1800 that fought a French privateer off Barbados.

In 1813, by then a captain, he was back in Canada, where he commanded the British artillery at the Second Battle of Sacket's Harbor.

In 1853 he was made Colonel-Commandant of the Royal Artillery, followed by promotions to Major-General in 1854, Lieutenant-General also in 1854 and full General[3] in 1863.