The First Battle of the Jiu Valley was a military engagement during World War I fought between Romanian forces on one side and Central Powers forces (Germany and Austria-Hungary) on the other. The German offensive, although initially successful, was checked within days and subsequently repulsed by a Romanian counterattack. This was the most conspicuous Romanian victory during the 1916 campaign, given that it was achieved against forces which were superior in artillery and - initially - in numbers as well.