I came across a blog post from a chap who had created a travel game in 5mm, it has several aspects that I think the small scale gamer will appreciate, so have brought the link across to here for your convenience.
LINK - http://thepennywhistle.blogspot.co.uk/2017/07/travel-napoleonic-5mm-set.html
Thanks for sharing.
Portable games are great, and even very possible in 10mm - 12mm scale, with little effort. I generally use a rolled, fabric mat for the groundcover, since it is so flexible, and permits layouts to be changed, endlessly.
Thanks for the link, Norm.