https://preview.redd.it/fyjyh5uw0jjb1.jpg?width=1386&format=pjpg&auto=webp&s=8674d5ae77b4fdaf2d831d5445ab1d5f1ef91678

This is my great great grandfather, one of my family relatives claims these are red-army uniforms. Which sparked a debate. Can anyone provide an answer?