After World War I, opposition to the scheme gave rise to a movement to re-segregate the executive and engineering branches because during the war, officers were not able to be equally proficient at both engineering and executive duties. As part of this movement, the Royal Naval Engineering College was reopened in 1919, and in 1922 engineering training began for midshipmen, instead of sub-lieutenants. In 1921, the naval college at Osborne was no longer needed and was closed. By 1925, there were five branches of the Service: Military, Medical, Accountant, Naval Instructor, and Artisan. That year, an Order in Council ended the scheme, splitting the service into 12 categories: Executive, Engineer, Medical, Dental, Accountant and Instructor Officers, Chaplains, Shipwrights, Ordinance and Electrical Officers, Schoolmasters and Wardmasters. Shortly afterwards, the ranks of Midshipman (E) and Sub-lieutenant (E) appeared in Orders in Council for the first time. In 1931 mate was abandoned again, and mates were re-mustered as sub-lieutenants. The scheme left behind common entry, so all candidates for the engineering branch entered the Navy by the same route as those in the executive branch.