During the 1948 Arab–Israeli War Ben-Gurion oversaw the nascent state's military operations.
During the first weeks of Israel's independence, he ordered all militias to be replaced by one national army, the Israel Defense Forces (IDF).
To that end, Ben-Gurion used a firm hand during the Altalena Affair, a ship carrying arms purchased by the Irgun led by Menachem Begin.
He insisted that all weapons be handed over to the IDF.
When fighting broke out on the Tel Aviv beach he ordered it be taken by force and to shell the ship.
Sixteen Irgun fighters and three IDF soldiers were killed in this battle.
Following the policy of a unified military force, he also ordered that the Palmach headquarters be disbanded and its units be integrated with the rest of the IDF, to the chagrin of many of its members.
By absorbing the Irgun force into Israel's IDF, the Israelis eliminated competition and the central government controlled all military forces within the country.
His attempts to reduce the number of Mapam members in the senior ranks led to the "Generals' Revolt" in June 1948.

As head of the Jewish Agency from 1935, Ben-Gurion was de facto leader of the Jewish population even before the state was declared.
In this position, Ben-Gurion played a major role in the 1948 Arab–Israeli War When the IDF archives and others were opened in the late 1980s, scholars started to reconsider the events and the role of Ben-Gurion.
During the 1948 Arab–Israeli War Ben-Gurion oversaw the nascent state's military operations. During the first weeks of Israel's independence, he ordered all militias to be replaced by one national army, the Israel Defense Forces (IDF). To that end, Ben-Gurion used a firm hand during the Altalena Affair, a ship carrying arms purchased by the Irgun led by Menachem Begin. He insisted that all weapons be handed over to the IDF. When fighting broke out on the Tel Aviv beach he ordered it be taken by force and to shell the ship. Sixteen Irgun fighters and three IDF soldiers were killed in this battle. Following the policy of a unified military force, he also ordered that the Palmach headquarters be disbanded and its units be integrated with the rest of the IDF, to the chagrin of many of its members. By absorbing the Irgun force into Israel's IDF, the Israelis eliminated competition and the central government controlled all military forces within the country. His attempts to reduce the number of Mapam members in the senior ranks led to the "Generals' Revolt" in June 1948.
As head of the Jewish Agency from 1935, Ben-Gurion was de facto leader of the Jewish population even before the state was declared. In this position, Ben-Gurion played a major role in the 1948 Arab–Israeli War When the IDF archives and others were opened in the late 1980s, scholars started to reconsider the events and the role of Ben-Gurion.
David Ben-Gurion