 They, and their descendants, who are also entitled to registration, are assisted by UNWRA in 59 registered camps, 10 of which were established in the aftermath of the Six-Day War in 1967 to cope with new Palestinian refugees.Being the only refugees in the world to be mainly inherited, including unregistered, displaced persons and refugee descendants, the Palestinian Arab refugee and displaced population has grown to be the second largest in the world, after an estimated 11,000,000 Syrians displaced by the Syrian Civil War.They are also the world's oldest unsettled refugee population, having been under the ongoing governance of Arab states following the 1948 Arab–Israeli War, the refugee populations of the West Bank under Israeli governance since the Six-Day War and Palestinian administration since 1994, and the Gaza Strip administered by the Islamic Resistance Movement (Hamas) since 2007.