After the 1948–49 Arab–Israeli War, the Golan Heights were partly demilitarised by the Israel-Syria Armistice Agreement. During the following years, the area along the border witnessed thousands of violent incidents; the armistice agreement was being violated by both sides. The underlying causes of the conflict were a disagreement over the legal status of the demilitarised zone (DMZ), cultivation of land within it and competition over water resources. Syria claimed that neither party had sovereignty over the DMZ. Israel contended that the Armistice Agreement dealt solely with military concerns and that it had political and legal rights over the DMZ. Israel wanted to assert control up till the 1923 boundary in order to reclaim the Hula swamp, gain exclusive rights to Lake Galilee and divert water from the Jordan for its National Water Carrier. During the 1950s, Syria registered two principal territorial accomplishments: it took over Al Hammah enclosure south of Lake Tiberias and established a "de facto" presence on and control of eastern shore of the lake.