So of all the novels I’ve read. A couple of them with mcs who have the ability to summon modern troops (IE Modern Cheats). Since that novel gave a brief description of the mcs skills along with the base his summoned troops constructed. In my opinion tho that could’ve been a great game themed isekai novel if he delved futhur in the base construction. But honest question, why isn’t there more novels with mcs that has rts background unlike the mainstream mcs these days? Particular JP novels. Is it because it wouldn’t work or is it that JP writers think that there are going to be some flaws with a Mc from a rts background?
RTS games are not popular in Japan like they are in Korea. You would be better off looking for a Korean novel with these elements instead.
Death March kara Hajimaru Isekai Kyusoukyoku (Not that it is the main focus of the story and not even a starting skill)
Rts expert skill are just too hard to be written down if the writer isn't a veteran rts player or else it would come off as vague and confusing.