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Your challenge is to have modern Israel encompass (formally. as it fully recognized by the UN, don't worry about every other power because those guys can be fickle ) the territory of Gaza, West Bank, Golan Heights and Lebanon. All of this after 1900, so there is wiggle room in the sense that you can change the initial partition areas.
Extra points go to anyone who can get a larger area either with or without legal recognition. *Please no flame wars*