Fall is expected to bring another grueling test for Ukraine’s armed forces as Russia intensifies its campaign to seize an eastern region, once Ukraine’s industrial heartland and a territory it has long sought to conquer.
Russia now controls about 70% of the Donetsk region. Ukraine's forces have been pushed back to a string of four cities that analysts have dubbed its “fortress belt,” where they've repelled Moscow's efforts to seize the region for years.
