Ghajar is a small town to the east of Marjayoun. It is of no great significance except that it sits atop the Hasbani river. As early as 1980, if not before, Israel was working on revetments along the Hasbani (on Lebanese territory) to expedite the flow of water into Israel. The town is now divided between a "liberated" Lebanese portion and an occupied Syrian portion.
The Daily Star - Politics - Israel proposes 'defense wall' through town of Ghajar: "Israeli security officials Tuesday proposed building a 'defense wall' through the divided town of Ghajar, which straddles the border of occupied Syrian and Lebanese territories, as a means of protecting Israelis from attack by Lebanese militias.
The Shin Bet security agency will present Israeli Prime Minister Ariel Sharon its recommendation Wednesday to build a barrier in Ghajar to prevent attacks on the southern part of the town.
Half of Ghajar lies on land Israel captured from Syria and Lebanon in the 1967 Middle East war."