On 14 May 1948, on the last day of the British Mandate, Ben-Gurion declared the independence of the state of Israel.
In the Israeli declaration of independence, he stated that the new nation would "uphold the full social and political equality of all its citizens, without distinction of religion, race".

In his War Diaries in February 1948, Ben-Gurion wrote: "The war shall give us the land.
The concepts of 'ours' and 'not ours' are peace concepts only, and they lose their meaning during war."
Also later he confirmed this by stating that, "In the Negev we shall not buy the land.
We shall conquer it.
You forget that we are at war."
The Arabs, meanwhile, also vied with Israel over the control of territory by means of war, while the Jordanian Arab Legion had decided to concentrate its forces in Bethlehem and in Hebron in order to save that district for its Arab inhabitants, and to prevent territorial gains for Israel.
Israeli historian Benny Morris has written of the massacres of Palestinian Arabs in 1948, and has stated that Ben-Gurion "covered up for the officers who did the massacres."

After leading Israel during the 1948 Arab–Israeli War, Ben-Gurion was elected Prime Minister of Israel when his Mapai (Labour) party won the largest number of Knesset seats in the first national election, held on 14 February 1949.
He remained in that post until 1963, except for a period of nearly two years between 1954 and 1955.
As prime minister, he oversaw the establishment of the state's institutions.
He presided over various national projects aimed at the rapid development of the country and its population: Operation Magic Carpet, the airlift of Jews from Arab countries, the construction of the National Water Carrier, rural development projects and the establishment of new towns and cities.
In particular, he called for pioneering settlement in outlying areas, especially in the Negev.
Ben-Gurion saw the struggle to make the Negev desert bloom as an area where the Jewish people could make a major contribution to humanity as a whole.
He believed that the sparsely populated and barren Negev desert offered a great opportunity for the Jews to settle in Palestine with minimal obstruction of the Arab population, and set a personal example by settling in kibbutz Sde Boker at the centre of the Negev.

During this period, Palestinian fedayeen repeatedly infiltrated into Israel from Arab territory.
In 1953, after a handful of unsuccessful retaliatory actions, Ben-Gurion charged Ariel Sharon, then security chief of the northern region, with setting up a new commando unit designed to respond to fedayeen infiltrations.
Ben-Gurion told Sharon, "The Palestinians must learn that they will pay a high price for Israeli lives."
Sharon formed Unit 101, a small commando unit answerable directly to the IDF General Staff tasked with retaliating for fedayeen raids.
During its five months of existence, the unit launched repeated raids against military targets and villages used as bases by the fedayeen.
These attacks became known as the reprisal operations.

In 1953, Ben-Gurion announced his intention to withdraw from government and was replaced by Moshe Sharett, who was elected the second Prime Minister of Israel in January 1954.
However, Ben-Gurion temporarily served as acting prime minister when Sharett visited the United States in 1955.
During Ben-Gurion's tenure as acting prime minister, the IDF carried out Operation Olive Leaves, a successful attack on fortified Syrian emplacements near the northeastern shores of the Sea of Galilee.
The operation was a response to Syrian attacks on Israeli fishermen.
Ben-Gurion had ordered the operation without consulting the Israeli cabinet and seeking a vote on the matter, and Sharett would later bitterly complain that Ben-Gurion had exceeded his authority.

Ben-Gurion returned to government in 1955.
He assumed the post of defense minister and was soon re-elected prime minister.
When he returned to government, Israeli forces began responding more aggressively to Egyptian-sponsored Palestinian guerrilla attacks from Gaza, which
On 14 May 1948, on the last day of the British Mandate, Ben-Gurion declared the independence of the state of Israel. In the Israeli declaration of independence, he stated that the new nation would "uphold the full social and political equality of all its citizens, without distinction of religion, race".
In his War Diaries in February 1948, Ben-Gurion wrote: "The war shall give us the land. The concepts of 'ours' and 'not ours' are peace concepts only, and they lose their meaning during war." Also later he confirmed this by stating that, "In the Negev we shall not buy the land. We shall conquer it. You forget that we are at war." The Arabs, meanwhile, also vied with Israel over the control of territory by means of war, while the Jordanian Arab Legion had decided to concentrate its forces in Bethlehem and in Hebron in order to save that district for its Arab inhabitants, and to prevent territorial gains for Israel. Israeli historian Benny Morris has written of the massacres of Palestinian Arabs in 1948, and has stated that Ben-Gurion "covered up for the officers who did the massacres."
After leading Israel during the 1948 Arab–Israeli War, Ben-Gurion was elected Prime Minister of Israel when his Mapai (Labour) party won the largest number of Knesset seats in the first national election, held on 14 February 1949. He remained in that post until 1963, except for a period of nearly two years between 1954 and 1955. As prime minister, he oversaw the establishment of the state's institutions. He presided over various national projects aimed at the rapid development of the country and its population: Operation Magic Carpet, the airlift of Jews from Arab countries, the construction of the National Water Carrier, rural development projects and the establishment of new towns and cities. In particular, he called for pioneering settlement in outlying areas, especially in the Negev. Ben-Gurion saw the struggle to make the Negev desert bloom as an area where the Jewish people could make a major contribution to humanity as a whole. He believed that the sparsely populated and barren Negev desert offered a great opportunity for the Jews to settle in Palestine with minimal obstruction of the Arab population, and set a personal example by settling in kibbutz Sde Boker at the centre of the Negev.
During this period, Palestinian fedayeen repeatedly infiltrated into Israel from Arab territory. In 1953, after a handful of unsuccessful retaliatory actions, Ben-Gurion charged Ariel Sharon, then security chief of the northern region, with setting up a new commando unit designed to respond to fedayeen infiltrations. Ben-Gurion told Sharon, "The Palestinians must learn that they will pay a high price for Israeli lives." Sharon formed Unit 101, a small commando unit answerable directly to the IDF General Staff tasked with retaliating for fedayeen raids. During its five months of existence, the unit launched repeated raids against military targets and villages used as bases by the fedayeen. These attacks became known as the reprisal operations.
In 1953, Ben-Gurion announced his intention to withdraw from government and was replaced by Moshe Sharett, who was elected the second Prime Minister of Israel in January 1954. However, Ben-Gurion temporarily served as acting prime minister when Sharett visited the United States in 1955. During Ben-Gurion's tenure as acting prime minister, the IDF carried out Operation Olive Leaves, a successful attack on fortified Syrian emplacements near the northeastern shores of the Sea of Galilee. The operation was a response to Syrian attacks on Israeli fishermen. Ben-Gurion had ordered the operation without consulting the Israeli cabinet and seeking a vote on the matter, and Sharett would later bitterly complain that Ben-Gurion had exceeded his authority.
Ben-Gurion returned to government in 1955. He assumed the post of defense minister and was soon re-elected prime minister. When he returned to government, Israeli forces began responding more aggressively to Egyptian-sponsored Palestinian guerrilla attacks from Gaza, which
David Ben-Gurion