Despite opposition from Turkey, President Donald Trump authorizes an arms deal with the Syrian Kurds to assist the Syrian Democratic Forces in their fight against Islamic State of Iraq and the Levant (ISIL).
- U.S. President Donald Trump authorizes the doubling of Section 232 tariffs on imports of aluminium and steel from Turkey, to 20% and 50% respectively. The Turkish lira further falls to a new record low against the U.S. dollar and Turkish stocks tumble.
- The U.S. summons Turkish ambassador Serdar Kilic after violence between protesters and Turkish security personnel outside the Embassy of Turkey, Washington, D.C. leaves over a dozen people injured. U.S. Senator John McCain calls on the Trump administration to expel the ambassador.
- Turkish jets hit Kurdish-led Syrian Democratic Forces (SDF) militia with 26 airstrikes in three recently-captured-from-ISIL villages west of al-Bab and northeast of Aleppo. The Turkish General Staff says between 160 and 200 have been killed, while the Syrian Observatory for Human Rights reports 11 dead and dozens of people wounded.
- Kurdish-led fighters completely encircle the ISIL-held town of Manbij, near the Turkish border, while Syrian forces move closer to ISIL's de facto capital, Raqqa.
- An ISIL suicide bomber kills 14 people and wounds over 60 others at a police checkpoint near Hamid Karzai International Airport. The attack coincides with Afghan Vice President Abdul Rashid Dostum returning to Afghanistan after more than a year in exile in Turkey. Dostum and his entourage are unwounded.