Complex sentence: On 11 June, a party of soldiers returned from East Africa were brought in and on 13 July, Egba rebels pulled up railway lines at Agbesi and derailed a train.
Split into simpler sentences: On 11 June, a party of soldiers, recently returned from East Africa, were brought in. On 13 July, Egba rebels pulled up railway lines at Agbesi and derailed a train.