The Latin phrase in memoriam means in memory of.
This is a photo of my father in his Navy uniform. He was fortunate enough not to have to participate in wars. But he was a an evacuee from Karelia when he was young so he knew war. In memoriam of my father.
Ritva Sillanmäki Photography 
What a happy and friendly smile! It must be wonderful to have such a photo of your father.
yes, I have very fond memories of him.