Here is who the young man depicted in the photo is

The leader of the "Bright Armenia" faction, Edmond Marukyan, made a post on his Facebook page congratulating the Armenian Army on its day. Marukyan quoted his oath text, adding that it remains in effect.

“Having entered the armed forces of the Republic of Armenia, I solemnly swear to serve my Motherland, the Republic of Armenia, selflessly and to spare my life for her, to abide by the Constitution and laws of the Republic of Armenia, to unconditionally obey the orders of my commanders, and to maintain military secrecy. Should I violate my oath, let me be punished to the full extent of the law. My oath is in effect. I am serving the Republic of Armenia.”