 A few days later in response to UN pressure, the AU agreed not to expand the mandate but did allow preemptive strikes against Al-Shabaab and promised more troops from other African countries.On July 23, 2010, Djibouti and Guinea pledged troops to AMISOM.On 17 September 2010, an AU envoy said in Nairobi that AMISOM's size had grown from 6,300 to 7,200 troops after an additional battalion from Uganda joined the force.