1) European river 2) European waterway 3) European watercourse 4) Greek watercourse 5) Greek river 6) Greek waterway 7) River in Greece 8) River in Europe 9) Waterway in Europe 10) Waterway in Greece 11) Watercourse in Greece 12) Watercourse in Europe Found on https://www.crosswordclues.com/clue/crna
[river] Thus, the river makes a bend of almost 180 degrees east of Bitola. This bend was part of the Macedonian Front in World War I. It was known to the allied forces as the Cerna Bend or Cerna Loop, and two major battles were fought here : the Battle of the Cerna Bend (1916) and the Battle of the Cerna Bend (1917). The name Crna means `bl... Found on http://en.wikipedia.org/wiki/Crna_(river)