What promises did the British make during WWI? Did they follow through on those promises? Explain.

Please try and answer this question to the best of your ability and please answer this question in your own words. :)

Britain's first promise was the secret 1916 Sykes picot treaty with France to divide the territory between Britain and france. Britain second promise, in the McMahon Hussein correspondence, waste pledge the land to the arabs in return for their revolt against the Turkish ottoman overlords

can you tell me what is it