Complex sentence: Hostilities between the Indigenous Australians and the British settlers began just a few months after the First Fleet arrived in January 1788, with casualties on both sides occurring as early as May 1788; these conflicts would come to be known as the Australian frontier wars.
Split into simpler sentences: Hostilities between the Indigenous Australians and the British settlers began just a few months after the First Fleet arrived in January 1788, with casualties on both sides occurring as early as May 1788. These conflicts would come to be known as the Australian frontier wars.