To understand Palestine you must understand four concepts:
1. The Continental divide between the Mediterranean and the Persian Gulf,
2. Handling both the local and other Super-Powers (my Previous thread)
3. Balancing the trade Routes coming from the Sea and going to Present day Iraq.
4. Controlling the three major north-south Highways and the Routes east from Palestine.
The first key is the Continental divide between the Mediterranean and the Persian Gulf. This is the area where you have tribe after tribe. These have survived for centuries morphing over time but basically staying the same. Trade routes are the most important factor (For example The President of Syria is a Druse, whose tribe has had extensive trade connections with the Christian Falange of Lebanon, in fact as the Christians lost the Lebanese Civil war, the President Of Syria sent in his army to support the Falange against the Moslem who was winning the war). Another example was the Crusades, Damascus was an independent Moslem city allied for most of the Crusades with the Crusaders (Except when Sadalin managed to unite what is now Egypt and Upper Iraq against the Crusaders, then allied themselves with Saladin till Saladin's empire collapsed at his death, then reverted to allied with the Crusaders). Another example from the Crusades is the protection of the Assassins (a Shiite Radical religious group) by the Templers.
All of the above was derived from the trade routes. Occasionally the various tribes would unite against a common enemy, for example the Israeli King Ahab of the Bible lead one such attack against the Assyrians (While King Arab is in the Bible this battle is NOT, but we know it from Assyrian Text of the Battle). Another example is when the Mumaluks decided to do a preemptive attack on the Mongols stationed in Syria. The various Crusaders in the area supported the attack, giving his troops free passage and supplies to do the attack. The night before the attack the Crusaders even hosted a dinner for the Mumaluks (Officially no Crusaders participated in the battle for no non-Moslem could serve in a Moslem army, but we know that Christians had served in the Caliphs army in previous centuries, passing themselves as "Moslems" for the duration of the Service, thus it is possible, and probably probable, that the Crusaders served with the Mumaluks). Now this unity was fleeting, for the Mamaluks were afraid that the Crusaders could do for the Mongols what the Crusaders had done for the Mamaluks, thus within years of the battle over the Mongols, the Mamaluks destroyed the last of the Crusading Cities, destroying the cities AND THEIR PORT facilities (of these more later) do to fear of the Mongols. This made the whole area even more of a backwater than it had been before, for previously it had been a hub of commence, afterwords an isolated backwater which the Mamaluks kept it the Mamaluks were defeated by Napoleon.
Thus the tribes of the Divide thus have united against common enemies and one of the ways to control the area is to make sure you have allies among the local tribes. Each valley is controlled by another tribe. Now the Coastal area is different, unlike the Divide the Coastal Area has to fear attacks from the sea AND THE THREE SUPER POWER ONLY WANT THE COASTAL ROAD NOT THE MOUNTAINS. For example when Napoleon marched from Egypt to Syria during his Egyptian Campaign one of his Generals mentioned about take Jerusalem, he said NO, it would be to dangerous and he did not need Jerusalem to march from Egypt to Syria, he only needed to protect himself from attacks from the direction of Jerusalem and the Judean Mountains (i.e. the West Bank). The Ancient Philistines lived around what is now the Gaza Strip and a little further north, the Ancient Phoenicians lived is what is now Beirut Lebanon and a little further south. The Ancient Israelis Controlled the Area between those two groups. The Philistines and Phoenicians were Seafarers the ancient Israelis were not. Thus both the Philistines and Phoenicians would trade all over the Mediterranean but for local support looked to the Strongest inland tribe. In Biblical times that tended to be Israel. This was a two way street, the Philistines and Phoenicians controlled the sea routes, the Ancient Israelis Controlled the area between the Coast and the Mountains (Thus when Solomon tried to open a Red Sea port, the sailors for the boats all where Phoenicians). When the Assyrians destroyed the Philistines the Jews moved in so by the time of the Roman Empire Judea included not only the Judean Mountains and Central Modern Israeli but also the Gaza Strip (With the Phoenicians holding on to their sea trade till Alexander the Great took Tyre, and even then the Phoenicians continued to control the sea trade till Carthage lost the last Phoenicians Trade colonies during the Second Punic War). From the time of Alexander the sea trade from Palestine was either in Greek hands or Jewish hands with the Greeks expanding their grip of the sea trade during the time of the Roman Empire. Thus during the time of Christ you have Jewish Cities and Greek Cities throughout what is now Israel, with the Greek Cities being tied in with the Sea trade replacing the Philistines and Phoenicians. This continued through the Roman period and into the time of the Crusades when the Italians replaced the Greeks in the Eastern Mediterranean (You had some Arab sea traders but minor compared to the Greeks and then the Italians). The Arab Conquest of the 7th Century does NOT seem to have changed these routes much, the Arabs just ruling as a small elite over the area till the Arab Empire broke up in the 9th Century. The Turks took the place of the Arab, but the area we are discussing were always a border area between the Mountains and the Sea.
A third factor is that there are only three major North South Roads in Palestine. If you want to go from Syria to Egypt (the the Reverse) you have to take one of these three routes. The preferred route is the Coast highway and this is the route taken by Alexander and Napoleon (and most other Invaders). The problem is the two interior routes are shorter for the natives (Through NOT for the Invaders) and thus the natives can pick and choose where to fight anyone invading along the Coast Highway. The main interior route is the King's Highway and its extension for Hebron to Jerusalem to Meggido (Also called, Armageddon, Legio, Lejjun, el-Lejjun, Harmagedon, Isar-Megiddo, Megiddon, tel Megiddo, tel el-Mutesellium and most recently el-Lejjun). If you have these three cities AND the Judean mountains in between, you can gather a local army and move it to intercept anyone moving along the Coastal Highway (Generally at Megiddo, which is way it is named at the place of the last battle in the Bible, is has been one of the most Fought over Cities in History for more on Megiddo see:
http://www.ancientroute.com/cities/Megiddo.htm).
Given this interior lines to control Palestine you have to Control these interior lines and thus the Judean Mountains, Hebron and Jerusalem (but if you just passing through you do not, but expect to fight someone unless their are paid off but even then you need Meggiddo). Control of these three areas was the key to the following:
1. Ancient Kingdom of King David and King Solomon,
2. the subsequent rule by an alliance between the Northern kingdom of Israel and the Kingdom of Judea,
3. with the destruction of the Northern Kingdom, the subsequent power of Judea tell it was destroyed by the Babylonians,
4. the key to the Independent Judea Kingdom of the Maccabees and Herod's the Great Kingdom and
5. the key to the Crusading Kingdoms of the Crusades (Through by the Crusades Meggiddo was rarely if ever fortified its last name El-lejjun is derived from the latin for Legion, the Sixth Roman Legion was stationed there after the Jewish Revolt of 70 AD, Meggiddo abandonment after the Arab Invasion is the product of the simple fact that to hold Meggido you have to keep a professional army in Meggido, you have to pay people to be there, in pre-Jewish times the area just ransomed the Caravans going on the King's Highway, in Ancient Israeli, Solomon kept his Northern Army at Meggiddo, In Roman Time the Roman Legion. The problem is after the Arab Conquest and Collapse Palestine ended up broken up in a series of Small kingdoms NONE OF THEM RICH ENOUGH TO KEEP TROOPS IN MEGGIDDO, so it stayed abandoned, The Crusaders once they took Palestine wanted to live on their new lands NOT live as professional Soldiers, and the same with the Moslems when the Mamaluks took over, thus unmanned to this day for even Modern Israel does not have the PROFESSIONAL troops to man Meggiddo).
Thus the Ancient Israelis would gather their forces and fight anyone who took the Coast Highway UNLESS PAID OFF or were afraid of an attack themselves (For example when the Assyrians destroyed the Philistines, the Israelis stood aside least the Assyrians switched their attack to Judea proper). By the time of Alexander the Israelis had been a Subject people for 200 years stayed in their Cities and Mountains rather than try to stop Alexander's Army. When Alexander's successors tried to suppress them the Jews revolted and used the Assets of the Judean Mountains to fight a guerrilla war against those Greeks (The revolt of the Maccabees is in the Catholic but not Jewish or Protestant Bibles).
One of the keys to having a successful Country in Palestine has been to control all three of these roads (The others are appeasing the various local tribes in the Mountains, playing any super powers against each other AND maintaining contact with port cities of Beirut, Tyre and now Tel Avie). These four things are the main reason for the Fighting between Israel and the Palestinians, but most importantly BOTH WHAT TO CONTROL THESE ROADS AND THUS PALESTINE. Furthermore the Israelis view the Judean Mountains as a potential strategic retreat in case they are ever overrun by the surrounding Arabs and thus want to control those mountains (Which means control the West Bank).
More on the Coastal road (Also called the Way the Sea):
http://www.ancientroute.com/WayofSea.htmMore on the King's highway:
http://www.ancientroute.com/HeadrFtr/tkingshwy.htmTopo map of Palestine:
http://www.palestineremembered.com/Acre/Maps/Story584.htmlRoad map of Palestine (Note only two roads to Hebron, than you see the three roads I Mentioned):
http://www.palestineremembered.com/Acre/Maps/Story575.html