This is basically an unholy child of WWI and WWII. The earlier episodes are basically the WWI and the later one feels more like WWII . The same applies to the equipment however the manga has more of more modern WWII feel when the LN has more of WWI stuff.
If it is still bothering you just think about it as what would happen if there wasn't the interwar period and the world jumped from WWI without a pause.
@AngryFerret
Yeah, and the existence of mages, even in a very early and unrefined form, also would influence technological development and application on the battlefield in both obvious and more emergent ways. It'd encourage way more thinking about air power of course, "how can we counter/replicate mage effects on a mass scale, or for that matter deploy our limited numbers more rapidly and in top form", pushing fighters/bombers to be much faster and fly much higher. But it'd also have an effect on things like the effectiveness of artillery. Having high quality spotting available in all terrain constantly, 80+ years before the development of drones, would massively change the effectiveness of indirect fire. And that in turn would mess with all sorts of other tactics, and further push "how to do we take out their scouts", so both their own mage forces but also fighters, improved AA, etc.
In a peaceful environment it might not actually change things that fast, historically most militaries were quite conservative and big on tradition by default. But in a great war with ultra rapid back and forth the butterfly effect would propagate pretty quick.
@Toriichii They don't do a very good job of conveying that in this chapter but that was my impression as well, that they dug those trenches and tunnels themselves and the piggies are just occupying them. Still, tunneling is a massive undertaking in time and manpower even when not being secretive.
This is one of those moments when happenstance decides to be useful.
@KaranVess
Tanya's growth is hindered by the military training and the conditions of the battlefront, especially the food, so while she gets older we might not see much difference in her appearance.