The Partition of Bengal made by Lord Curzon in 1905 lasted until

States that the partition was annulled in 1911 and gives the official reason (to curb revolutionary terrorism).

A student can combine this date (1911 annulment) with the basic external fact that World War I began in 1914 to judge whether the annulment occurred during the War.

Explains that Britain recruited a vast contingent of Indians to serve in Europe, Africa and West Asia during the First World War.

A student can use this to connect British wartime manpower needs (1914–18) to possible policy changes and then compare timing with the 1911 annulment noted elsewhere.

Gives the exact announcement date of the 1905 partition and frames it as a key trigger for intensified nationalist politics.

Use this to establish the start date of the partition (1905) and then compare the duration until annulment (1911) versus the WWI period (basic external knowledge).

Describes the Swadeshi and Boycott movement beginning with the 1905 partition and the political consequences that followed.

A student can infer that strong nationalist agitation followed partition and then consider whether the British response (annulment) was prompted by pre‑War political factors rather than wartime troop needs.

Presents administrative reasons given for partition (relief of Bengal, development of Assam) and shows partition was debated and planned well before 1905.

A student could contrast stated administrative motives and the chronology of planning (late 19th/early 20th century) with the timing of annulment and WWI to assess causal links.