on 15, 2016, Kenya experienced its largest ever military defeat when al-Shabaab fighters attacked and overran an AMISOM forward operating base garrisoned by KDF troops from the 9th Rifle Battalion at El Adde in Somalia.
"The president needs to define what the end-state in Somalia looks like. Insisting that we shall stay the course may sound like an admirable policy; in practice, it is unsustainable given growing domestic insecurity." https://africanarguments.org/2014/06/to-prevent-more-mpeketonis-kenya-must-define-somalia-exit-plan-by-abdullahi-boru-halakhe/
"If the people in Kismayo want a devolved authority that is nominally answerable to Mogadishu, but autonomous at the same time, then that discussion should be left to the Somalis themselves" https://africanarguments.org/2013/09/kenya-needs-a-comprehensive-exit-plan-in-somalia-by-abdullahi-boru-halakhe/
Domestically, Kenya's Somalia intervention torpedoed the nascent police reform. http://america.aljazeera.com/opinions/2014/4/kenya-somalis-refugeecounterterrorismalshababsomalia.html
Kenya has also lost in regional diplomacy since/because of Somalia intervention. https://www.aljazeera.com/opinions/2020/1/29/somalia-kenyas-foreign-policy-failure