Question: What international military formation was headquarter in Helmand Province, Afghanistan?
Sentence (from "2017 Sangin airstrike"): A spokesman for the Afghan defense ministry, Dawlat Waziri, denied the reports of civilian casualties but witnesses in the area corroborated the UN report that there were no Taliban members in the area and that U.S. troops had visited the neighborhood days before the incident.
Relevant evidence: No