Help Identifying Old Army Photos

I found these two photos in my grandmother's photo box but cannot identify the people in them. They're both military photos.

My grandma's parents were Jews from Leczna and my grandpa's parents were Jews from Glusk, so the people in the photo are likely relatives from either side. They could be non-JewishPolish friends of any of their parents as well, but the location is certainly narrowed down to the Lublin area.

Any help will be greatly appreciated!