Royal Marines Volunteer Cadet Corps was created in 1901.
California Cadet Corps was created in 1911.
National Police Cadet Corps was created in 1959.
Corps of Colonial Marines was created in 1808.
Youth Volunteer Corps was created in 1987.
Shanghai Volunteer Corps was created in 1853.
Singapore Volunteer Corps was created in 1854.
Bermuda Volunteer Rifle Corps was created in 1894.
Romanian Volunteer Corps in Russia was created in 1917.
Lancaster Volunteer Ambulance Corps was created in 1953.
United States Naval Sea Cadet Corps was created in 1958.
Per Mere, Per Terram "by Sea, by Land" it was a battle honour to a royal marine victory in the American Revolutionary War, if you want the commando ethos look: http://www.royalnavy.mod.uk/royalmarines/
I think you mean when WAS the Marine Corps created. it was founded on November 10th 1775!