The ADF also undertook several operations in Australia's immediate region during the 2000s. In 2003, elements of all three services were dispatched to the Solomon Islands as part of the Regional Assistance Mission to the Solomon Islands. Regular deployments of Australian forces continued to the islands until 2017. Between December 2004 and March, 1,400 ADF personnel served in Indonesia as part of Operation Sumatra Assist, which formed part of Australia's response to the devastating 2004 Indian Ocean earthquake. In May 2006, approximately 2,000 ADF personnel deployed to East Timor in Operation Astute following unrest between elements of the Timor Leste Defence Force. This deployment concluded in March 2013.