Evatt enlisted in the army in 1865, with the rank of assistant-surgeon in the
25th Regiment of Foot. He saw active service for the first time in the
Perak War of 1875. A few years later, he was twice
mentioned in dispatches during the
Second Anglo-Afghan War, serving under General
Sir Charles Gough. He participated in the
Battle of Ali Masjid, the
Bazar Valley expedition, the
relief of Sherpur, and the
advance on Kabul, organising multiple
field hospitals. From 1880 to 1886, Evatt was a medical officer at the
Royal Military Academy, Woolwich. His time there was interrupted by his service in the
Mahdist War, where he participated in the
Battle of Tamai and the
Suakin Expedition. He was awarded the
Khedive's Star. Evatt was stationed in British India from 1887 to 1891, where he was the senior medical officer at
Quetta. During that time he was a member of the
Zhob Valley expedition of 1890. He returned to England in 1892 as the chief sanitary officer at the
Royal Artillery Barracks, and in 1894 was appointed secretary to the
Netley Hospital. Evatt was promoted to
surgeon-colonel in 1896, and from then until 1899 served as the principal medical officer at
Hong Kong. He was promoted to surgeon-general in November 1899, and until his retirement in 1903 – on his 60th birthday – was the principal medical officer for the
Western District, based at
Salisbury. Evatt's obituary in the
British Medical Journal observed that he would be "chiefly remembered for his persistent advocacy of the formation of the medical officers of the army into a Corps". His efforts in that regard began at least as early as 1884, when he read a paper to the
Royal United Services Institute calling for a series of reforms. The
Royal Army Medical Corps (RAMC) was eventually established in 1898. When the
Royal Army Medical College opened in 1907, Evatt was one of four officers whose names were placed on a memorial dedicated to those who had been instrumental in the creation of the RAMC. ==Other interests==