There never has been an independent, self-governed national entity called “Palestine.”
In Biblical times, the region now encompassing Israel was known as Canaan, which included the kingdoms of Israel and Judah. The term “Palestine” originally referred to a small area occupied by the Philistines (as one theory has it), from whence comes the name “Palestine.” In Roman times, the area was known as Judea and was ruled by Jewish kings, and, under the Roman Emperor Constantine, became a Christian province generally known in Europe simply as “The Holy Land.” The name “Palestine” was not legally applied until the British occupation starting in 1915.
And, of course, following the Second World War and the Holocaust, the region was established as Israel, a Jewish state, although Arab Muslims have full civil rights in that nation. But an independent, self-governed state of “Palestine” did not…