What did Britain promise to Sharif Hussein?

Britain promised Sharif Hussein of Mecca support in establishing an independent Arab state in exchange for his assistance in revolting against the Ottoman Empire during World War I. This agreement was part of the McMahon-Hussein Correspondence, where Britain indicated its intention to recognize Arab independence in regions under Ottoman control, except for certain areas. However, the promise ultimately conflicted with the Sykes-Picot Agreement and later the Balfour Declaration, leading to significant disappointment among Arab leaders.