Ethiopian military victory: By 23 May Ethiopia claimed "[its] troops had seized vital command posts in the heavily defended Zalambessa area, about 100km (60 miles) south of the Eritrean capital, Asmara". But the Eritreans claimed they withdrew from the disputed border town of Zalambessa and other disputed areas on the central front as a "...'goodwill' gesture to revive peace talks" while Ethiopia claimed it was a 'tactical retreat' to take away one of Ethiopia's last remaining excuses for continuing the war, ("The scale of Eritrean defeat was apparent when Eritrea unexpectedly accepted the OAU peace framework."). Having recaptured most of the contested territories—and heard that Eritrean government in accordance with a request from the OAU would withdraw from any other territories it occupied at the start of fighting—on 25 May 2000, Ethiopia declared the war was over. By the end of May 2000, Ethiopia occupied about a quarter of Eritrea's territory, displacing 650,000 people and destroying key components of Eritrea's infrastructure.
source: http://www.guardian.co.uk/world/2000/may/25/ethiopia http://edition.cnn.com/2000/WORLD/africa/12/23/eritrea.ethiopia.02/
Ethiopia wins the war: http://news.bbc.co.uk/2/hi/africa/771675.stm
Eritrea reveals human cost of war: http://news.bbc.co.uk/2/hi/africa/1398446.stm
Ethiopia's victory statement: http://news.bbc.co.uk/2/hi/world/monitoring/media_reports/773082.stm