(For other uses, see 2/3rd Pioneer Battalion (Australia).) The 3rd Pioneer Battalion was an Australian infantry and light engineer unit raised for service during the First World War as part of the all volunteer Australian Imperial Force (AIF). Formed in Victoria in March 1916, the battalion subsequently undertook further training in the United Kingdom before arriving in France in late 1916. It later served on the Western Front in France and Belgium until the end of the war. Assigned to the 3rd Division, the 3rd Pioneer Battalion fought in most of the major battles that the AIF participated in between mid-1916 and the end of the war in November 1918. It was subsequently disbanded in early 1919.