My first attempt at properly creating a map, based on the premise of a TL I have planned.
The POD is that Hashemite Syria is recognised by the Allies in return for a series of major concessions, such as: Forfeiting any claims to the Med Coast (divided into British Mandatory Palestine and the French mandates of Greater Lebanon, Alawite State and Hatay), favouring and supporting Franco-British economic interests and allowing the presence of French and British forces on Syrian soil.
Issues such as continued Jewish immigration into Palestine, ethnic tensions, and the presence of an independent Syrian state, prove to be particularly incendiary within the Mandates. Demonstrations (often violent and triggering revolt) in favour of integration into Syria occur throughout the Levant, yet ultimately fail, facing diametric opposition from factions such as the Maronites in Lebanon. The Hashemite government itself grapples with significant instability during the first decade of its existence. In Palestine, the situation becomes increasingly volatile. Despite having officially revoked the claim to Palestine, the Hashemite government embarked on an often-contradictory policy, fostering a relationship with the prominent Pro-Negotiation Nashashibi family along with supplying Arab nationalist efforts in the Mandate, while simultaneously negotiating with Zionist authorities.
Following a particularly brutal insurgency in the Mandate, British authorities partition Palestine in 1936, launching a series of major population transfers. The "Palestinian" regions are transferred to the Hashemites, while "Jewish" regions are granted independence as the State of Israel. Jerusalem and an Arab Christian corridor remain as a buffer zone (akin to the OTL Peel Commission plans), and are later integrated into Syria in the late 50s. French administrators opt to carry out a similar policy of "Partition and Transfer," over the course of two decades Frances cedes Hatay, a significant portion of Greater Lebanon (including Tripoli and it's corresponding region, Bekka Valley, Sidon etc) while evicting and expelling much of the Muslim population from the remnant Mandate.
The Alawite State fell into civil war in 1964, between the primarily rural Alawite Pro-French separatists and urbanite Pro-Syrian nationalists. The conflict essentially stalling both independence and integration efforts.