The Battle of Skra-di-Legen was a two-day battle which took place at the Skra fortified position, located northeast of Mount Paiko, which is north-west of Thessaloniki, on May 29–30, 1918, on the Macedonian front of World War I. The battle was the first large-scale employment on the front of Greek troops of the National Defense Army Corps, and resulted in the elimination of a whole enemy regiment and the capture of the heavily fortified Bulgarian positions.

Mountain Paiko or Pajak in Bulgarian is a small mountain range that lies on the border of the Pella and Kilkis regional units in Central Macedonia, Greece.