Great photos Kathryn. I edited your post to include the images for better visibility to those who might help.
The top photo looks like a something from the front, either the German line with Germany, Belgium, or Holland. I don't think that it will be possible to exactly identify where it comes from. The third pic looks like from any studio, very possibly in England or France in their doughboy uniforms. Are there any marks or studio marks on the actual photos?