The Battle of Didgori began August 12, 1121, leading to the defeat of Seljuk army in Georgia.
დიდგორის ბრძოლა

The battle took place at Didgori valley, some 40 km away from Tbilisi, with Georgian army led by King David IV Aghmashenebeli (the builder) defeating outnumbering
Seljuk army led by Najm ad-Din Ilghazi, Artukid ruler of Mardin. 
Civil Georgia | Georgia Marks 900 Years Since ‘Miraculous Victory’ in Didgori Battle

900th Anniversary of Battle of Didgori
Issued by Georgia’s post office in 2022

A 56,000-strong Georgian army under King David IV intercepted and defeated a Seljuq invasion force totalling at least 150,000 men at Didgori, near Tbilisi. David followed up his victory with the capture of Tbilisi in the year 1122. David IV of Georgia (1073-1125) – Weapons and Warfare

King Aghmashenebeli (1089-1125 AD)
Part of the Kings of Georgia series
Issued by Georgia in 2014
Designer: A. Khundzakishvili

 

The Miraculous Didgori Battle – Georgia Today 
‘Miraculous Victory:’ Battle of Didgori, 1121 | Armchair General Magazine – We Put YOU in Command!