Complex sentence: On 30 June the Brigade was ordered to hand over 50 per cent of its vehicles to the Eighth Army and the brigade was dispersed in July, for the defence of the Delta, then to perform guard duties.
Split into simpler sentences: On 30 June the Brigade was ordered to hand over 50 per cent of its vehicles to the 8th Army. The brigade was dispersed in July, initially allotted to the defence of the Delta then ordered to perform guard duties.