Complex sentence: On 17 March 1941, Buckmaster was appointed to SOE's French section and following an attachment to T-Section, the Belgian Section, to assist Hardy Amies from July 1941, he was noted as a future head of F Section.
Split into simpler sentences: On 17 March 1941, Buckmaster was appointed to SOE's French section. Following an attachment to T-Section, the Belgian Section, to assist Hardy Amies from July 1941, he was noted as a future head of F Section.