Why did Turkey invade? Why did America leave? How did the Kurds gain so much land? The New York Times answers 10 key questions about the Turkish invasion of northern Syria.
The Turkish invasion of Kurdish-held territory in northern Syria has complicated an already chaotic war.
What began eight years ago as a series of nonviolent protests against the Syrian government morphed into an international conflict, between dozens of local factions, the Islamic State group and several foreign countries.
Now, a US ally is attacking a group that fought side by side with US troops for years — and much