Data Update: Expanded Coverage of Political Violence in Yemen

Update:

On 8 December 2025, ACLED released the second and final instalment of data for this project, concluding the addition of new data from an undisclosed source into the Yemen dataset. This newest update covers the correction period from 2 October 2022 to 31 December 2023, and adds 1,837 new events, 1,283 corrections to previous events, and 1,874 fatalities to the dataset. 

With the completion of this second and final instalment, the full project has added a total of at least 4,337 new events and at least 3,474 fatalities to the dataset across its two releases. 

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Previous update:

On 14 July 2025, ACLED integrated new event data from an undisclosed source into the Yemen dataset, covering the period from 1 January 2024 to 1 July 2025. This expansion provides enhanced visibility into conflict dynamics across the country, particularly in regions where reporting has historically been limited.

The update adds over 2,500 new events and includes more than 1,400 updates to existing events, totaling about 4,000 new or updated events. At least 1,600 additional fatalities have been recorded as a result. 

Users should note a 30-day gap in coverage between 1 and 30 January due to a suspension in reporting by the source over that period. At the time of writing, ACLED is working on integrating new data from this source covering the period from 2 October 2022 to 31 December 2023. The new data for this period will be published at a later date to provide additional insight into the conflict trajectory in Yemen since the expiration of the UN-brokered truce. 

The newly added events are concentrated in the governorates of Abyan, Ad Dali, Al Hudaydah, Lahij, and Taizz, accounting for approximately 85% of the total new events. The majority of new events are armed clashes, primarily along the front lines between Houthi and anti-Houthi forces. The total number of fatalities from “Armed clash” events has nearly doubled, increasing by 90%, following this update. 

Summary of Changes

Date of publication: 14 July 2025

Countries affected: Yemen 

Temporary scope: 1 January 2024 to 1 July 2025

New events and corrections: over 2,500 new events and more than 1,400 updates to existing events

Fatalities added: At least 1,600 new fatalities were added to the dataset

Forthcoming expansion: New data covering 2 October 2022 to 31 December 2023 will be integrated in future updates. Users conducting temporal analysis should be aware that data for this earlier period is not yet available, and therefore trends prior to 1 January 2024 are not directly comparable to present-day coverage.

Coverage note: There is a gap in coverage, with only sporadic events from this source recorded between 1 to 30 January 2024.