What did the Treaty of Sèvres (San Remo conference) and the Treaty of Lausanne say about Judaea and Shomron (the West Bank)?

Neither the Treaty of Sèvres (1920) nor the Treaty of Lausanne (1923) directly addressed the status of the Judaea and Shomron as a distinct entity. This is because the term "West Bank" only emerged later, after the 1948 Arab-Israeli War, to refer to Judaea and Shomron as the territory west of the Jordan River that was occupied by Jordan.

Here's what those agreements did say in relation to the broader region: San Remo Conference (1920) and the Treaty of Sèvres (1920):

Dismantling the Ottoman Empire: The Treaty of Sèvres was a post-World War I pact that formally dismantled the Ottoman Empire.

Creation of Mandates: The San Remo Conference (which preceded and laid the groundwork for Sèvres) determined the allocation of Class "A" League of Nations mandates for the administration of former Ottoman territories.

British Mandate for Palestine: 

The significant outcome for the area now known as the "West Bank" was the British Mandate for Palestine. This mandate, approved at San Remo, incorporated the Balfour Declaration of 1917, which expressed support for "the establishment in Palestine of a national home for the Jewish people."

Boundaries of Palestine: 

The Mandate for Palestine encompassed the area that would later be divided into present-day Israel, the West Bank, and Gaza, as well as Transjordan (present-day Jordan). 

Importantly, Transjordan (east of the Jordan River) was later excluded from the provisions for a Jewish national home within the Mandate.

The Treaty of Sèvres, though signed, was ultimately rejected by Turkish nationalists and never fully ratified.

Treaty of Lausanne (1923): replaced the Treaty of Sèvres. 

It was the final treaty concluding World War I and was signed by Turkey (the successor to the Ottoman Empire) and the Allied powers that recognized the boundaries of the modern state of Turkey.

Renunciation of Former Arab Provinces: 

Crucially, Turkey renounced all claims to its former Arab provinces, including those that fell under the British Mandate for Palestine. This solidified the international recognition of the British Mandate over Palestine, which included the territory that would later become the West Bank.

In summary, while the terms "West Bank" did not exist at the time, the San Remo Conference and the Treaty of Sèvres (though superseded) established the framework for the British Mandate for Palestine, which included the geographical area that would eventually become the West Bank. 

The Treaty of Lausanne confirmed Turkey's renunciation of claims to these territories, thereby reinforcing the international legitimacy of the Mandate. 

The current status of the West Bank is a result of later events, including the 1948 Arab-Israeli War, the 1949 Armistice Agreements, Jordan's annexation of the territory, and the 1967 Six-Day War and subsequent Israeli Liberation from Jordanian occupation.

.