Complex sentence: After hearing rumours that they were to be sent off to fight the Ottoman Empire which was Muslim, the soldiers revolted, killing their officers and several British civilians before being suppressed by troops arriving from Johor and Burma.
Split into simpler sentences: After hearing rumours that they were to be sent off to fight the Ottoman Empire, which was a Muslim state, the soldiers revolted. They killed their officers and several British civilians before being suppressed by troops arriving from Johor and Burma.