Before the full-scale invasion began, more than 10,000
ENDF troops had been built up in deep inside Somalia since the first incursion in June 2006. Much of the
Bay and
Bakool regions had already been occupied by Ethiopian troops. Days before the full scale invasion, there 20,000 Ethiopian troops were stationed in and around
Baidoa, the capital of Bay region, while the ICU claimed the figure deployed in Somalia had risen to over 30,000. The first battle of the full-scale invasion erupted on 19 December 2006 at the battlefield of Idaale, 60 kilometres south of
Baidoa. After taking mounting losses following a week a fighting against the
Ethiopian National Defence Force in open battle, the
Islamic Courts Union began withdrawing it forces across its front lines almost simultaneously. American
gunships, including helicopters and the
AC-130 provided
air support for Ethiopian troops. During this fighting the
Ethiopian Air Force bombed
Mogadishu airport, killing several people in an airstrike. The TFG envoy to Ethiopia announced they would lay
siege to Mogadishu until it surrendered, rather than directly assault the city. "We are not going to fight for Mogadishu to avoid civilian casualties…Our troops will surround Mogadishu until they surrender," he told reporters in Addis Ababa. On 26 December, Ethiopian PM
Meles Zenawi announced the Ethiopia troops were not planning to enter Mogadishu. On 27 December, the Islamic Courts vowed to wage a
guerilla movement that would extend for "years and years and years." As Ethiopian troops approached, they were accompanied by the warlords who the ICU had defeated in mid-2006. The Ethiopians allowed the warlords to regain control over the fiefdoms they had previously lost to the courts.
Resignation of ICU Leaders As fighting neared Mogadishu, the Islamists turned over their weapons to the clans in the capital and the
Hawiye, one of Somalia's largest clans, began discussing a peaceful resolution with the interim government. The stability created by the Islamic militias also began to collapse with people returning to their homes and bandits once again roaming the streets. Fighting began early on the 27th in
Yaqshid, a district in northern Mogadishu, as clan militias attempted to raid an arms warehouse. The clan militias, who had been disarmed by the ICU, appeared to be attempting to rearm in preparation for the return of the warlords associated with the government. Abdirahman Dinari, spokesperson for the TFG, stated that these were a minority of militias and that they would be "dealt with" once they had taken control of the city. Most businesses had closed by the 28th, as proprietors waited for developments. The top leaders of the ICU, including
Sheikh Hassan Dahir Aweys, Sheikh
Sharif Sheikh Ahmed and Sheikh
Abdirahman Janaqow, resigned in anticipation of the siege. Their official press release called upon ICU fighters to secure the areas in which they were stationed and expressed their regret that foreign powers had invaded the country and that Somalia would return to chaos. ==Entry of ENDF/TFG==