The Sykes–Picot Agreement was a secret wartime deal in 1916 in which Britain and France agreed how they would divide most Arab provinces of the Ottoman Empire into British and French zones of control and influence if they won World War I. It is significant because it symbolized European colonial partition of the Middle East, clashed with British promises of Arab self‑determination, and helped shape the mandate system and later state borders that still structure politics and conflicts in the region.[1][2][3][4]

What the agreement was

• It was concluded in May 1916 between British diplomat Mark Sykes and French diplomat François Georges‑Picot, with assent from Russia and (later) Italy.[1]
• The deal divided Ottoman Arab lands outside the Arabian Peninsula into:
  • Direct French control in parts of what are now southeastern Türkiye and coastal Syria–Lebanon (the “blue” area).[3][1]
  • Direct British control in southern Mesopotamia (southern Iraq) and access to the ports of Haifa and Acre on the Mediterranean (the “red” area).[3][1]
  • Two interior “A” and “B” Arab areas where an Arab state or confederation would exist but Britain (in area B) and France (in area A) would have priority for loans, enterprises, and advisers.[3]
  • An internationally administered “brown” zone around what would become Palestine.[3]
• The agreement assumed an Allied victory and the partition of Ottoman territories, and it remained secret until the Bolsheviks published it in 1917, provoking outrage among Arab leaders who had been promised independence.[4][1]

Why it was historically significant

• It marked a key moment in the partition of the Ottoman Empire and was a precursor to the League of Nations mandates decided at San Remo (1920), which created British and French mandates in Iraq, Palestine, Transjordan, Syria, and Lebanon along lines similar to Sykes–Picot.[2][5]
• It clashed with the McMahon–Hussein correspondence, in which Britain had signaled support for an independent Arab kingdom in exchange for the Arab Revolt, and later with the Balfour Declaration on a “national home for the Jewish people” in Palestine.[4][1]
• This web of overlapping and partly incompatible promises—Arab independence, Zionist aspirations, and Franco‑British spheres—laid the diplomatic and political context for later disputes over Palestine and broader Arab mistrust toward Western powers.[6][1][4]
• For many in the Arab world, the agreement came to symbolize colonial betrayal and the imposition of “artificial” borders that disregarded ethnic, tribal, and sectarian realities.[7][8][1]

Mandates and borders shaped in its spirit

• Under the postwar mandate system, Britain took Iraq, Palestine, and Transjordan; France took Syria and Lebanon, fragmenting the Arab provinces into separate state projects rather than a single Arab polity.[5][2]
• Borders of modern Iraq, Syria, Lebanon, Jordan, and the territory of Israel/Palestine were drawn in the 1920s mandate negotiations, heavily influenced by Sykes–Picot’s logic of Anglo‑French zones even though the exact 1916 lines were modified.[9][2][1]
• These borders also split contiguous communities such as the Kurds and Druze into several states and often grouped disparate communities within single polities, feeding later tensions and claims of denied self‑determination.[10][11][2]

Illustration: core elements

How its legacy is debated

• Some scholars and commentators argue Sykes–Picot “created the modern Middle East,” framing both territorial units and patterns of external intervention that later powers, including the United States, continued.[11][4]
• Others emphasize that the exact Sykes–Picot lines did not become today’s borders and that later treaties (for example, Sèvres and Lausanne), local dynamics, and mandate politics were at least as important.[12][13][1]
• Still, even critics of the “Sykes–Picot explains everything” narrative accept that it was part of a wider set of colonial arrangements that constrained Arab state‑building and embedded unequal relations with Western powers.[9][11][4]