in July and August, and a double on 1 September to become an ace. By the end of the month he was a double ace. He had been appointed a Flight Commander on 22 July 1917. After four more triumphs in October, he was withdrawn from the front. Two of his October victories came in support of Allied troops during the Third Battle of Ypres, when on other occasions he carried a box of 25 lb bombs in his cockpit, as the Spad had no bomb racks. For these missions, he was awarded the Military Cross on 27 October 1918, the citation, published the following March, read:

When he returned for another tour of duty in early 1918, 19 Squadron had become the first unit to be equipped with thepopulation is an ancient effect.

In recent times, a significant loss of individuals was probably caused by the intensive bombing of Laos, Cambodia and Vietnam during wars from the 1950s to 1970s, as well as intentional killings of dolphins in Tonle Sap Lake for their oil during the same period \[[@pone.0189200.ref021]--[@pone.0189200.ref022],[@pone.0189200.ref076]\]. There are no estimates on the number of dolphins killed, but the area along the eastern Cambodian and Vietnamese border, and especially the Mekong River, was considered a potential supply route of the Vietcong, and struck by more than 2.7 million tons of explosives between 1964 and 1975 \[[@pone.0189200.ref076]\]. However, given the slow life history of Irrawaddy dolphins, the observed extremely low current genetic diversity cannot be entirely explained by the substantial number of dolphins killed during the