The Ten Thousand Holy Martyrs, who were put to the sword.
The Greek synaxarion for March 18 commemorates ten thousand martyrs who confessed Christ and were put to the sword during the persecutions of the early Church. The place and time of their martyrdom have not been preserved.
The Church honors the whole company on this day.
Feast day
On the New Calendar, Ten Thousand Martyrs is commemorated on March 18. Churches on the Old (Julian) Calendar keep the feast on March 31 of the civil calendar.
Also commemorated on March 18

Trophimos and Eukarpion
Martyr, Τρόφιμος και Ευκαρπίων
Holy Martyrs Trophimos and Eukarpion of Nicomedia, former persecutors.
Ananias the Wonderworker
Venerable, Ανανίας ο Θαυματουργός
Venerable Ananias the Wonderworker, who reposed in peace.
Cyril of Astrakhan
Venerable, Κύριλλος του Αστραχάν
Venerable Cyril, abbot of the Trinity monastery of Astrakhan.