The Wall Street Journal - After nine years of civil war, Syria doesn�t get much attention these days. But a Russian-Syrian military offensive in Idlib province is a reminder that the broken country�s problems seldom stay within its borders.

In December the Russia-backed Assad regime began a push to retake Idlib, the country�s last opposition-held province. Turkey has fought a lonely fight against the offensive, which has taken a terrible toll on civilians and has become bloodier in the past week. Last Thursday the regime killed more than 30 Turkish soldiers�the most casualties in a day since Ankara entered the conflict in 2016. The Turks have been retaliating, and it�s unclear how the offensive will end.

Already some one million refugees�the biggest displacement in the war�have headed toward the Turkish border. This is a political and practical problem for Turkish President Recep Tayyip Erdogan, whose country is losing patience with the roughly four million refugees it already holds. In 2016 Mr. Erdogan cut a deal with the European Union to house these migrants, but he occasionally threatens to unleash them on Europe.

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