The SAF has sent forces to assist in operations outside the country, in areas such as Iraq and Afghanistan, in both military and civilian roles. In the region, they have helped to stabilise East Timor and have provided aid to Aceh in Indonesia following the 2004 Indian Ocean earthquake and tsunami. Since 2009, the Republic of Singapore Navy (RSN) has deployed ships to the Gulf of Aden to aid in counter piracy efforts as part of Task Force 151. The SAF also helped in relief efforts during Hurricane Katrina  and Typhoon Haiyan. Singapore is part of the Five Power Defence Arrangements, a military alliance with Australia, Malaysia, New Zealand, and the United Kingdom. In 2019, the nation was placed 7th most peaceful country on the Global Peace Index.