This is a really cool concept, but needs UX/UI updates,
( Mainly the radio & unit selection for me )
I really like the idea of WW1 as a subtheme, maybe you could make a timeline with smaller battles at first so you can learn mechanics, smaller battalions without gas / artilery attacks, & build up from there.
the tutorial should be gradual, a big infoblock can be overwhelming to many players.
Overall I love the concept, and hope you update it so it can be a full on strategy game. ( and maybe a web-build ;) ;) )
Also really cool you managed to do so much in a low level engine such as Love2D.