Complex sentence: Dinar instead countered the deployment of the Camel Corps detachment by moving his own troops, forty cavalry and ninety infantry, to reinforce Jebel el Hella and the British believed he was preparing for an invasion of Sudan.
Split into simpler sentences: Dinar instead countered the deployment of the Camel Corps detachment by moving his own troops, forty cavalry and ninety infantry, to reinforce Jebel el Hella. However by now the British believed he was preparing for an invasion of Sudan.