This conflict is multifaceted, complex, and is still one of the world’s most problematic issues in international relations. One aspect of this conflict is the refugee problem that began in 1948, with the creation of the State of Israel. Over 700,000 Palestinians became refugees that year, in what is known as the Nakba (The Catastrophe)
During the 1948, around 85% (720,000 people) of the Palestinian Arab population were expelled from their homes, to the West Bank, the Gaza Strip, and to the countries of Lebanon, Syria and Jordan.
Between December 1947 and March 1948, around 100,000 Palestine Arabs fled out of fear from the Zionist organizations who were executing organized terror attacks and massacres against Palestinians. Those who first fled the terror were from the higher and middle classes from the cities, who left voluntarily.
between April and July, a further 250,000 to 300,000 Palestinian Arabs left or were expelled, mainly from major northern or coastal Palestine cities of Acre, Haifa, Tiberias, Safad and Jaffa, which lost more than 90 percent of their inhabitants, the Expulsions took place in many towns and villages, particularly along the Jerusalem road and Eastern Galilee.
About 50,000-70,000 inhabitants of Lydda and Ramle were expelled towards Ramallah by the Israel Defense Forces during Operation Danny, and most others during operations of the IDF in its rear areas, During Operation Dekel, the Arabs of Nazareth and South Galilee were allowed to remain in their homes.
On 11 December 1948, the UN General Assembly in non-binding Resolution 194, Article 11 resolved that the refugees who wish to "live at peace with their neighbors … should be permitted" to return to their homes at the "earliest practicable date “This forms one basis for the Palestinian political claim for a 'Palestinian right of return'.