Nahal (Hebrew: נח"ל) (acronym of Noar Halutzi Lohem, lit. Fighting Pioneer Youth) refers to a paramilitary Israel Defense Forces program that combines military service and the establishment of agricultural settlements, often in peripheral areas. In later years, the program expanded to include volunteering and social welfare projects. Its groups of soldiers formed the core of the Nahal Infantry Brigade.
In 1948, a gar'in (core group) of Jewish pioneers wrote to Prime Minister David Ben-Gurion requesting that members be allowed to do their military service as a group rather than being split up into different units at random. In response to this letter, Ben-Gurion created the Nahal program, which combined military service and farming.
Some 108 kibbutzim and agricultural settlements were established by the Nahal, many of them on Israel's borders. Nahal settlements in the Jordan Valley and the Arabah played an important role in Jordan's decision not to join the other Arab countries in attacking Israel during the Yom Kippur War.
Members of Nahal units, known as garinei Nahal (Nahal seeds) have served together in various army units, most famously in the Nahal Mutznakh (Airborne Nahal) battalion of the Paratroopers Brigade, the reserve battalion of which was instrumental in the Israeli victory in the Battle of Jerusalem during the 1967 Six-Day War. Many settlements founded by Nahal units in Galilee, the Negev, and the West Bank are still thriving today, including settlements formerly located in the Sinai Peninsula and Gaza Strip. Today, a gar'in is usually a group formed by a youth movement, such as the Israeli Scouts, for the purpose of volunteer work.