From OTC to OCB: the selection and training of junior officers during WW1

Published on 5 November 2026
Submitted by Charles Fair

This talk by Charles Fair looks at the formation of the Officer Cadet Battalion (OCB) system in 1916 and how it developed out of the OTCs and precursor Schools of Instruction.

Officer Training Corps was split into Junior Divisions (at public/secondary schools) and Senior Divisions (at universities, plus the Inns of Court OTC). The OTC were designed to create a reserve of educated young men with basic military drill, discipline, and leadership foundations.

By 1916, soaring casualties and the complexity of modern industrial warfare made ad-hoc training unsustainable. The army mandated that temporary commissions could only be granted to candidates who passed through a formal Officer Cadet unit.

By mid-1917 a highly professionalised system of OCBs had evolved, and this sat within a broader framework for developing officers. This system produced officers of sufficient quality and quantity that it helped enable the BEF's success in 1918.

From OTC to OCB: the selection and training of junior officers during WW1
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