Daniel Weeks enlisted in the 8th Infantry Battalion of the AIF on 17th August 1914, and was appointed Regimental Sergeant Major [RSM], a very important posting, particularly in a newly formed military unit. Ten days after the Landing at Anzac Cove, on 5th May 1915, the 8th Battalion, as part of the 2nd Brigade, was moved from Anzac Cove to Cape Helles to help in the attack on the village of Krithia. Weeks was wounded in the left shoulder .

He was evacuated by Hospital Ship Southland to Deaconess Hospital, Alexandria, Egypt on the 7th May 1915. He had three operations on his shoulder, but the bullet was not removed from his chest. He embarked in UK on 31st January 1918, and disembarked in Melbourne on 13th April 1918. He was given a month's leave and was discharged from the AIF on 30th May 1918. He was classified as permanently unfit for active service as a result of a wound. His service was classified as satisfactory. Tree No. 4, an elm, was planted by Miss Myrtle Quanchi, a Lucas girl, on 4th June 1917