To give a brief history of this valiant fighting group, it must be known that the Jewish Yeshuv, the agricultural settlements, were suffering from Arab maunders who would cause mayhem with the attempts of the Jewish settlers in setting up their settlements. This was due to the illegal immigration of the incoming Jews.The British, who at first encouraged the immigration of Jews to Israel, now openly banned Jewish immigration.

For this reason, the Hagganah, a Jewish underground armed organization was set up in. As Zionist outrages increased, the members of the Hagannah split over the question how to react to Arab protests. A group of men, headed by Avraham Tehomi, split from the main group and set up their own organization to be more active as terrorists.

After continued increased tensions and rioting, the new group split. Half of the members returned to the Hagganah, which was controlled by the Jewish Agency, and the other half formed what was called Irgun Zvi Leumi, (National Military Organization) and aligned themselves with the ideals of the fascist Zev Jabotinsky. They rejected the "restraint" policy of the Jewish Agency which preferred to use guerilla powers to forward the goal of reclaiming the land. The Irgun began carrying out armed assaults against the Arabs, which although provided relief for the settlers, caused political embarrassment for the Jewish Agency.
While the Jewish Agency tried to provide a image of the Jew as a moral person being terrorized by the Arabs, thus winning support from the non-Jewish world, albeit at the expense of the Jewish settlers, the Irgun moved into the vacuum and gave it's full support to the settlers.

In 1939, the British published another one of it's 'white paper' effectively curtailing immigration and causing other hardships on the illegal Jewish settlements.

The Irgun now turned it's attention to the terrorizing British forces. The Irgun began sabotaging the British government property and attacking their forces. The British replied with mass arrests but the perpetrators were concealed by their brethren who sided with them.

With the outbreak of World War II, the Irgun split again, some forces deciding to fight with the British against the Nazi Axis powers. This group declared a truce and joined the British army and the Jewish Brigade. The second group, led by Avraham Stern, the Fighters for the Freedom of Israel,later known as the Stern Gang.

In December of 1943, Menacham Begin took lead of the Irgun. With knowledge now of the Nazi holocaust and fate of European Jewry, the Irgun reversed its truce against the British and the policy of not allowing Jewish immigration.
The Irgun terrist group attacked British police stations, offices, and headquarters. They seized weapons and replenished their arsenal. The British began making mass arrests. Many Irgun fighters were driven into hiding.
Menachem Begin was forced into hiding. He took upon himself the disguise of a religious man and spent much time in a Synagogue in Tel Aviv under an assumed name.

The Jewish Agency and their group, the Hagannah moved against the Irgun. The Hagannah kidnapped several of the Irgun's members and handed them over to the British. The Irgun's activities were not reduced but not stopped. After World War II, the Hagannah realized that the British were not relenting their ban on immigration, and they were helping the native Arabs protect their land.
The three terrorist groups, the Irgun, the Hagannah, and the Stern Group (known also as Lechi ) combined to fight the British.
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The Irgun in a sensational attack blew up the wing of the King David hotel in Jerusalem, in May 1946, which housed the British Palestine Command. Warnings went unheeded and many lives were lost. The British were furious and carried out mass arrests. The Hagganah, ceased it's actions when it's leaders were arrested in August 1946, but the Irgun continued fighting. The British increased their troops to one hundred thousand men.

The Irgun staged a prison break, freeing 41 prisoners in a break at the Arce fortress. When the British hung three Irgun members, the Irgun captured three British soldiers and hung them in retaliation. The reputation of the Irguns terrorism was growing.

The State of Israel was being established. The Irgun offered to join forces with the Hagganah to form the Israeli army. The Irgun had a boat, the Altalena, of supplies and men coming into Jaffa port. The boat was laden with munitions needed by the Jewish defenders. The Hagganah wanted to take all supplies. Negotiation between the Irgun and the Hagganah ensued. No agreement was forged. The Hagganah opened fire on the Altalena, sinking the boat, killing and wounding Jewish lives and destroying supplies.
The commander of the Hagganah was Yitzhak Rabin.

The new state was established. The Jewish Agency and it's followers took up the leadership of the state. Today their political party is known as "Labor." The opposition party, led by those valiant soldiers in the Irgun became what is known today as the "Likud." These two groups till today are still fighting it out between themselves, just as they did in the time of the birth of the state of Israel.