Clitherow enlisted in the
British Army as an
ensign in 1799. He served in the Egyptian campaign of 1801, an expedition to Germany in 1805, and an expedition to the Netherlands in 1809. He participated in the
Peninsular War from 1810 to 1815, being wounded twice. He was promoted to colonel in 1821, and to major-general in 1830. In 1838, Clitherow was posted to
British North America, to serve as commanding officer of the military district of Montreal. He was accompanied by his son, who served as his
aide-de-camp. Clitherow arrived in Montreal in March, 1838, shortly after the
Lower Canada Rebellion had broken out in late 1837. He served as an advisor to
Lord Durham as a member of the
Special Council that administered
Lower Canada following the rebellion. When the second rebellion broke out Clitherow commanded 3,000 regulars that marched on rebel headquarters. He also presided over
courts martial that prosecuted the rebels. In 1841, he was transferred to
Canada West to command British forces there. == Deputy Governor General ==