I suspect if you had lived though a significant war you would probably think history was overly focused on social changes and should spend more time on technology and tactics.
And this makes sense: most soldiers spend most of their time waiting around for battles or marching from one battle to the next. The actual battles themselves take up very little of their time (even if they're extremely stressful).
The stories of those that lived through wars as civilians (the vast majority of people) of course never talk about technology and tactics as they had nothing to do with them.