Egypt agreed to an armistice on 24 Feb 1949, followed by Lebanon on 23 Mar 1949, Jordan on 3 Apr 1949, and Syria on 20 Jul 1949. Although Iraq and Saudi Arabia declared war on the Israel, they failed to enter armistice agreements. Neither the four Arab countries which entered Armistice agreements, nor Iraq and Saudi Arabia would recognize the State of Israel.
Egypt, Syria, Jordan, Lebanon, and Iraq invade the newly founded state, intent on its destruction. Fighting continues into the first months of 1949, punctuated by two truces, the first lasting from June 11 to July 8, 1948, and the second from July 18 to October 15, 1948.
The Provisional State Council assembled in one of Tel-Aviv’s oldest buildings and declared the establishment of the State of Israel. David Ben Gurion, Israel’s first Prime Minister, delivered the declaration. As explained on the website of the Israeli Knesset,
“The proclamation may be divided into four sections: the section that describes the history of the Jewish people, its struggle to renew its political life and the international recognition of this right; the operative section, that proclaims the establishment of the state; the section that declares the principles which will guide the State of Israel; and the appeal to the U.N., the Arab inhabitants of the state, the Arab states and world Jewry.
Even though the proclamation is neither a law nor an ordinary legal document, it has legal validity, and its first and third sections were made use of by the [Israel] Supreme Court for the purpose of normative interpretation.
The second section is the primary source of authority in the Israeli legal system. Some were inclined to view the Proclamation of Independence, and especially its declaratory section, as a constitution, but the Supreme Court stated, in a series of decisions, that the proclamation does not have constitutional validity, and that it is not a supreme law which may be used to invalidate laws and regulations that contradict it.”
Following on the British determination to end the Palestine Mandate, and the deliberation of the UN Special Committee on Palestine, the UN General Assembly [G.A. Resolution 181 (II)] recommends partitioning of the Mandate into separate Jewish and Arab States, with Jerusalem to be placed under an international regime. The resolution requested that the Security Council act on the recommendation, but no action was taken. Although the Jews accepted the proposal, it was rejected by the Arabs. Fighting among the local population remains prevalent through the founding of the State of Israel.