William Wallace Allison Burn was a New Zealand aviator, who served with the New Zealand Military Forces during the First World War.

The Mesopotamian Half-Flight (MHF), or Australian Half-Flight, was the first Australian Flying Corps (AFC) unit to see active service during World War I. Formed in April 1915 at the request of the Indian Government, the half-flight's personnel were sent to Mesopotamia where they were equipped with a small number of outdated and barely serviceable aircraft. They later operated in the Tigris Valley in support of British and Indian forces under the command of Major General Charles Townshend. The unit's operations came to an end in December 1915 and the following month the flight was subsumed into other units of the AFC which were being formed in Egypt. It was officially disbanded in October 1916.