STRUMA

or Kara-su, riv., Balkan Peninsula; rises in Bulgaria about 20 m. S. of Sofia; flows W. and S.E. through Bulgaria and Macedonia to _ enter Aigean Sea (40° 46’ N., 23° 53’ E.). In World War the Bulgarians by Gr. treachery descended the valley of the Struma and occupied Drama, Seres, and Kavala. See Satonrca (Salonica Army).