Sykes–Picot Agreement
The agreement is often accused of having "drawn lines in the sand", i.e. artificially dividing the Middle East without regard to ethnic or cultural factors. In fact the agreement was never (fully) implemented. It was in the San Remo Conference (1920) and Treaty of Lausanne (1923) that the lines were definitely drawn and decided who was going to govern (directly and indirectly) which parts of the partitioned Ottoman Empire, with Turkey wanting to rule areas that the French had initially hoped to govern. Although the agreement was indeed not implemented in its original form, the British and French were able to secure strategically important lands. The Arabs on the other hand did not see the establishment of an independent Arab kingdom as promised and felt betrayed.