Complex sentence: He flew MFS-54s for the 10th Army on the Artois and was later transferred to MFS 99 Squadron on the Serbian Front in May, 1915 where flew a total of 30 missions over enemy territory.
Split into simpler sentences: He flew MFS-54s for the 10th Army on the Artois and was later transferred to MFS 99 Squadron on the Serbian Front. In May, 1915 he flew a total of 30 missions over enemy territory.