Organizations

ATMIS

ATMIS was the African Union Transition Mission in Somalia — a peace support mission, not a membership organization. It ended on 31 December 2024 and was succeeded by AUSSOM.

Last updated: October 2026

About the mission

Field	Detail
Full name	African Union Transition Mission in Somalia (ATMIS)
Mandate	Peace support mission mandated to support Somalia's security transition, reduce the threat from Al-Shabaab, and hand security responsibility to Somali forces.
Location	Somalia
Status	Ended 31 December 2024
Successor	African Union Support and Stabilization Mission in Somalia (AUSSOM), from 1 January 2025 under UN Security Council Resolution 2767 (2024)

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Across the Bureau

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ATMIS was the African Union Transition Mission in Somalia, a peace support mission — not a membership organization, so it has no member countries. It ended on 31 December 2024 and was succeeded by AUSSOM on 1 January 2025.

Frequently asked questions

What was ATMIS?

ATMIS was the African Union Transition Mission in Somalia, a peace support mission mandated to support Somalia's security transition, reduce the threat from Al-Shabaab, and hand security responsibility to Somali forces. It was not a membership organization.

What replaced ATMIS?

The African Union Support and Stabilization Mission in Somalia (AUSSOM) succeeded ATMIS on 1 January 2025, under UN Security Council Resolution 2767 (2024).