Operation Sovereign Borders (OSB) is a border protection operation led by the Australian Defence Force and headed by Major General Andrew Bottrell, aimed at stopping maritime arrivals of asylum seekers to Australia. The operation is the outcome of a 2013 federal election policy of the Coalition, which commenced on 18 September 2013 after the election of the Abbott Government. The operation has largely addressed the issue of people smuggling into Australia, by implementing a tough "zero tolerance" posture towards illegal boat arrivals in Australia, in conjunction with mandatory detention. The current Commander Operation Sovereign Borders, Andrew Bottrell, was appointed to the command on 16 May 2015, after the first commander, Lieutenant General Angus Campbell, was appointed as Chief of Army