Complex sentence: On 18 May a patrol of 1/7 Gurkhas were guided by an informer to a camp in the mangrove, they flushed a party of rebels towards an ambush.
Split into simpler sentences: On 18 May, a patrol of 1/7 Gurkhas were guided by an informer to a camp in the mangrove. They flushed a party of rebels towards an ambush.