Noemvriana
The Noemvriana (Greek: Νοεμβριανά, "November Events") was an armed confrontation in Athens in December [O.S. November] 1916 between the Kingdom of Greece and the Allied Powers, arising from a dispute over Greece's neutrality in World War I, followed by reprisals and riots against Greek supporters of the Allies. Tensions began in May 1916, when the Greek fortress of Roupel was surrendered to the Central Powers, mainly Bulgarian forces, raising concerns among the Allies of a secret alliance between the Greek government and the Central Powers.