 In December 1915, General Herbert Plumer arranged for Solomon to visit the front lines and investigate techniques in use by the French.His ideas were accepted, and he was asked to set up a team to start the production of camouflage materials in France.On 31 December 1915, General Haig, Commander-in-chief of the British forces in France, instructed that Solomon be given the temporary rank of Lieutenant-Colonel to enable him to carry out his new duties.