He served with distinction in many battles of the Macedonian front during World War I , being eventually promoted to major .
Zervas was a fanatic Venizelist , and in 1916 he was among the very first to join the venizelist Movement of National Defence in Thessaloniki .
Zervas served with distinction in many battles of the Macedonian front during World War I , being eventually promoted to major .
Zervas was a fanatic Venizelist , and in 1916 he was among the very first to join the venizelist Movement of National Defence in Thessaloniki .