Such an affirmation is quite far from the truth, although, compared to the disputes between the Nashashibi and Husseini clans or the lack of Arab-Palestinian cohesion, the Jewish situation was very superior. The military structure of the Hagana (Defense) developed at the rhythm of Arab violence, and not before. The semi-official Hagana was founded in 1920, after the pogrom of Jerusalem. Until 1929 it was a small and irrelevant organization, and it began to strengthen from the underground with the Arab revolt (1936) when it began to form combat groups and not just wardens. In its moment of major boom, it was a force of about 50,000 men and women, most of them without permanent mobilization. The Hagana formed an elite unit, the Palmach ( Plugot Machatz – “attack groups”) created on May/5/1941. Originally, they were formed with help from the British to fight against a possible Nazi invasion to the Mandate. After the danger passed, it continued activating in spite of the British. In 1948 they had three combat brigades: aerial, naval and intelligence. From the Palmach, several leaders stood out, such as Moshe Dayan, Yigal Alon and Itzak Rabin. Being a Palmachnik was considered as a way of life. The policy of the Jewish leadership was defensive (Havlaga). After 1929 a group decided to practice a policy considered as more dissuasive towards the Arab-Palestinian terrorists. It was the Irgun Tzvai Leumi (Irgun) or Etzel (National Military Organization), which rejected ideologically the use of terrorism. The Irgun had about 5,000 soldiers. When in January of 1940 the Irgun decided to enroll with the British against the Nazis, a small group led by Abraham Stern separated and formed Lehi (Lohamei Herut Israel - Fighters for the Freedom of Israel), that believed that armed fight was the only way of attaining national independence. They were 500 soldiers.