Commissioned in to The Queens Rifle Volunteer Brigade, the Royal Scots (Lothian Regiment).
Promotted to rank of Lieutenant on the 8th March 1901 and to Captain on the 26th March 1904.
He resigned his Commission on the 28th May 1904.
On the 10th July 1916 he took over the command of the 2/8th Battalion Worcestershire Regiment after Lieut.-Colonel Francis Checketts was invalided home.
Mentioned-in-despatches (L.G. 18th February 1917) and (L.G. 22nd May 1917).
On the 5th December 1917 he was slightly wounded due to enemy shell fire but continued to command the battalion.
Awarded a Companion of the Most Distinguished Order of Saint Michael and Saint George (C.M.G.), for services rendered in connection with Military Operations in the Field (London Gazette 1st January 1918).
At the end of February 1918 he took over temporary command of the 182nd Brigade leaving Major H. W. Davies in temporary command of the 2/8th Battalion. On the evening of the 28th March 1918, Lieut.-Colonel Bilton returned back to take command of the 2/8th Battalion Worcestershire Regiment.
On the 20th June 1918, Colonel L. L. Bilton was invalided home and left the Battalion.
Awarded the Belgium Croix de Guerre (London Gazette 12th July 1918).