To try an svg image element to make the image fill the screen and self adjust its size (instead of just regular img tags) you could do something like...
Code:
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" height="100%" preserveAspectRatio="xMidyMid meet" version="1.1" viewBox="0 0 343 500" width="100%">
<image height="500" width="343" xlink:href="../Images/image123.jpeg"></image>
</svg>
Be sure to replace the the width & height (in pixels) in both places with those of your image, and edit the image path to match yours.
Would love to know when you publish it, I love reading WWII history of all kinds.