Complex sentence: The division was based at Banja Luka and was British led: the British codename for its involvement in IFOR was Operation Resolute and for its involvement in SFOR was Operation Lodestar.
Split into simpler sentences: The division was based at Banja Luka and was British led. The British codename for its involvement in IFOR was Operation Resolute and for its involvement in SFOR was Operation Lodestar.