Question: Were the Battle of the Ch'ongch'on River and the Battle of Chickamauga fought in the same decade ? 
Sentence (from "Battle of Chickamauga"): The Battle of Chickamauga, fought on September 18–20, 1863 between Union and Confederate forces in the American Civil War, marked the end of a Union offensive in southeastern Tennessee and northwestern Georgia — the Chickamauga Campaign.
Relevant evidence: Yes