Simplify the following text for a Grade 14 native English-speaking person.
Original: He resisted the well-ingrained tradition of parachuting senior officers from the armed forces into police commands ; and only with great reluctance did he give in to the demand from the Hertfordshire police committee that he use his wartime military rank .
Simplified: He resisted the well-ingrained tradition of bringing senior officers from the armed forces into police commands ; and only with great reluctance did he give in to the demand from the Hertfordshire police committee that he use his wartime military rank .