Final answer:
The Husein-McMahon correspondence stated British support for an independent Arab state in most of the Arab Middle East, including parts or all of Iraq, Syria, Jordan, Lebanon, and Palestine.
Step-by-step explanation:
The Husein-McMahon correspondence was a series of letters exchanged during World War I between the Sharif of Mecca, Hussein bin Ali, and Sir Henry McMahon, the British High Commissioner in Egypt. In these letters, the British expressed their support for an independent Arab state in most of the Arab Middle East, including parts or all of Iraq, Syria, Jordan, Lebanon, and Palestine.
This correspondence was significant because it raised expectations among Arab nationalists that the British would support their aspirations for self-determination and independence. However, the subsequent actions of the British, as outlined in the various historical sources provided, showed a different approach towards the Middle East that did not fully align with the promises made in the Husein-McMahon correspondence.