What Turkey's incursion into Syria means for the US

The US is confronted with a NATO ally taking on its main partner in Syria

Kurds make up the fourth largest ethnic group across the Middle East. They have their own culture, language and ethnicity that unites them across borders, but they have never had their own state.

Turkey has a sizable Kurdish population mainly in the east of the country. Fears that the Kurds would secede from Turkey have contributed to increasing hostility between the state and the community –- which makes between 15 and 20 percent of the Turkish population.

This has spilled over and resulted in bombings and attacks carried out by Kurds, and in turn met with punitive military assaults by Turkish forces.

Turkey’s concerns in Syria

A powerful military that united Kurds from across several borders bolstered Kurdish ambitions back in Turkey – peace talks with the Turkish state failed in 2015 and violence resumed.

Turkey also claims that Syrian Kurds have links to Turkish Kurds –- in particular the Kurdistan Workers’ Party, or PKK, that is designated a terror group by the international community, including the U.S.

Now following a series of strategic victories for the Kurds in Syria, Turkey has decided to step in.

How the U.S. is involved

Initially, Turkish reluctance to contribute to the operations against ISIS in Syria led the U.S. to partner with the only other viable fighting force in the land -– the Syrian Kurds.

In 2015 the Syrian Democratic Forces (SDF) were formed together with Syrian Arab rebel fighters, initially numbering several thousand fighters. Washington sent them arms and supplies, and supported the campaign to drive ISIS from wide areas in northeastern Syria.

The SDF have been the U.S.’s most effective fighting partners on the ground, directly confronting ISIS fighters and calling in U.S. airstrikes on jihadist positions.

What next?

The Joint Staff Director Lt. Gen. Kenneth F. McKenzie Jr. said that it was “not helpful to have these operations go on,” and that it was damaging to the overall effort against ISIS. He added, “We’re working with the Turks to try and minimize it.”