There never was a state called Palestine, the British took control of the land from the Ottomans. The Ottomans had controlled the land for centuries and before them the Syrians
No, I was implying there never was a state of Palestine, only Palestinians living in Palestinian territories
There are "Palestinian territories" but no functioning state matching eg the definition of statehood declared in the 1933 Montevideo Convention.
Three military forces if you count in Hamas