Possible War Crimes
Major General R. Dare Wilson, who served with the British troops policing the British Mandate of Palestine, reported that on Dec. 18, 1947, the Haganah murdered 10, mostly women and children, in the Arab village of al-Khisas. Wilson also claimed that on Dec. 31 the Haganah slaughtered another 14, again mostly women and children, in Balad Esh-Sheikh. (Aldershot: Gale & Polden, p.158, 1949)
The Arabs claim that forces of the Haganah played a large role in the expulsion and evacuation of Palestine Arabs living inside what today is Israel. One of their methods was to impose fear in the local populations. See proper discussion at Palestinian Exodus.
Although the Haganah didn't play an active role in the Deir Yassin massacre, the Haganah commander David Shaltiel is said to have allowed (albeit, with reluctance) forces of the Irgun and Lehi to execute the attack against the village. (Kfir, Ilan, Yediot Ahronot 4.4.72) Haganah units assisted them by providing mortar fire, they later withdrew from the area before the massacre begun. (Levi, Yitzhak, op. cit. p343-344; Pail and Isseroff, op. cit.)
On May 26, 1948, less than two weeks after the creation of the state of Israel on May 15, the Haganah, together with the smaller Irgun and Lehi, became the Israel Defense Forces.
Famous members of the Haganah included: Yitzhak Rabin, Ariel Sharon, Rehavam Zeevi.