Britain supplied Supply arms to American Indians who raided Attack American settlers on the frontier , hindering Hindering American expansion and provoking Causation resentment .

The ultimatum was however rejected Response and so , al-Shabaab launched Attack several attacks Attack on key sites in the city provoking Convincing a major government offensive Defending on 11 – 12 July , which led to Causation a total expulsion of Islamist forces from the city .