Palestine was originally a colony of which country?

Palestine was called Canaan in ancient times, including Israel, Jordan, Gaza and the West Bank. Historically, Jews and Arabs once lived here. From 0/020 BC to 923 BC, Jews established the Hebrew Kingdom here. After the Roman Empire conquered Palestine, it suppressed Jews many times, driving most of the survivors out of Palestine and living around the world. In 622 AD, the Arabs defeated the Roman Empire and took over Palestine. Since then, Arabs have become the main residents of this area. Palestine became a part of the Ottoman Empire from the16th century, and became a British mandated territory after the First World War. After the British occupation of Palestine, it was divided into two parts: the east of the Jordan River is called the outer Jordan, which is now the Hashemite Kingdom of Jordan; The west of the Jordan River is called Palestine (now Palestine), including Israel, Gaza and the West Bank of the Jordan River.