[citation needed] Coriat ordered the destruction of the Ngundeng Pyramid in Lou Nuer territory in Southern Sudan in 1928, shortly after photographing it.
In 1929, Coriat led an offensive raid that killed Gwek Ngundeng near the pyramid in Wec Deng village.
Coriat spent time in El Obeid briefly before moving on to other parts of Sudan until 1948.
His photographs, donated to the Pitt Rivers Museum, depict his stations and travels in Sudan/South Sudan.
[4] In 1930, Coriat received the Distinguished Conduct Medal (DCM), awarded in the King's Birthday Honours.