Until Australia became a Federation in 1901, each of the six colonies were responsible for their own defence. From 1788 until 1870 this was done with British regular forces. In all, 24 British infantry regiments served in the Australian colonies. Each of the Australian colonies gained responsible government between 1855 and 1890, and while the Colonial Office in London retained control of some affairs, and the colonies were still firmly within the British Empire, the Governors of the Australian colonies were required to raise their own colonial militia. To do this, the colonial Governors had the authority from the British crown to raise military and naval forces. Initially these were militias in support of British regulars, but British military support for the colonies ended in 1870, and t