1914 - 4th (T.F.) Bn. Oxf & Bucks LI - mobilized at Oxford;
1914 - Bucks Bn (T.F.) mobilised at Aylesbury and proceeded to Cosham, Hants.
1915 – 2nd Bn Oxf & Bucks LI -ANNEQUIN.
Companies exercised daily in Musketry, Drills and Physical Training.
1915– 1/1st Buckinghamshire Battalion – HEBUTERNE
Battalion in Billets –
Took over Trenches from 5/GLOSTERS -
C Coy MORAND – MARBOT incl
A Coy MARCEAU – BARAT
B & D Coys in Local Reserve in Billets North and North East outskirts of HEBUTERNE.
1948 – 1st Bn Oxf & Bucks LI - 52nd Amalgamating Cadre joined the Regiment under command of Major H. P. Patterson