I found ths copy on Abe Books, but not a cheap one to me.
https://www.abebooks.com/servlet/Boo...%26sortby%3D17
This reprint under the new title seems more like it to my budget
https://www.abebooks.com/servlet/Sea...s%20army&sts=t
And here it is new on Amazon UK for just a bit more.
https://www.amazon.co.uk/s?k=Fightin...ref=nb_sb_noss
Hope this helps,
Terry