ETHIOPIAN government forces and their allies captured Shire, one of the biggest cities in the northern region of Tigray, from regional forces they have been battling on and off since late 2020, two diplomatic and humanitarian sources said. The violence in Tigray, which has spilled over into neighbouring regions and drawn in the Eritrean military, has killed thousands of civilians, uprooted millions and left hundreds of thousands now facing possible famine. The conflict stems from grievances rooted in periods of Ethiopia's turbulent past when particular regional power blocs held sway over the country as a whole, and in tensions over…