The Mandate of Palestine.
The modern State of Israel was founded in the territory of the former British Mandate of Palestine in May 14, 1948.
The Palestine mandate was created from the former territory of the former Ottoman Empire following World War I then administered by the United Kingdom. The Palestinian borders were modern-day Israel and Jordan.
Israel, Jordan, and Iraq were part of the British mandate.
Israel is a country, so it cannot be born. The Modern State of Israel came out of the British Mandate for Palestine.
Britain administered a large area of territory in the region, called the British Mandate, from 1917 to 1948. As the mandate ended, the modern state of Israel was declared by its own inhabitants, on a relatively small piece of the mandate. The rest of it became parts of modern Lebanon, Syria, and Jordan.
The modern State of Israel came into existence in 1948. In 1940, the area where Israel predominantly sits (excluding the Golan Heights) was called the British Mandate of Palestine. The Mandate of Palestine was not a country, but a colony of the British Empire. What made a mandate different from a colony was that the British had an obligation to help the people living in the territory to form their own government and facilitate independence. In the specific case of the Mandate of Palestine, they were required to do this for the Jews and the Arabs together.
The Modern Nation of Israel came into existence through the philosophical aspirations of Zionists, the gradual settlement of Halutzim (Pioneers) in the British Mandate of Palestine, the Militias of the Haganah, Palmach, and Irgun, the UN Partition Plan of 1947 and its vote to sanction a modern Jewish State, the declaration of Statehood by Ben Gurion in 1948, and the War of Independence (1948-1949). All of these things went into the Establishment of the Modern Nation of Israel.
The 20th century, specifically May 14, 1948.
The Jewish State of Israel.
May 14, 1948.
The United Nations approved Resolution 181 which provided for the creation of a Jewish State in the British Mandate of Palestine. The actual creation of that state was undertaken by prominent Zionists in the British Mandate.
Israel has competed in the Olympics ever since its modern state was created in 1948.