"In the late afternoon they came in sight of the ordu beside the willow-lined stream."

-The Daughter of Erlik Khan

ordu

n. army, military, host, or in this usage, the camp of a body of fighting men

Literary Impressions of the Prose and Verse of Robert E. Howard

https://www.amazon.com/Well-Heroes-Literary-Impressions-Robert/dp/1546353844/ref=sr_1_1/139-6536987-6675238?s=books&ie=UTF8&qid=1493920079&sr=1-1