[ WP ] In an alternate universe , gunpowder was never invented . What does warfare look like ?

The electrical hum from the tesla generators always bothered me. there was just something unnatural to the sound, the instructors in basic said it was a because of a humans primal fear of lighting, but seeing and hearing the lightning pop and arc across the soggy ground still sent shivers down my spine. 
 
 Flicking the switch I activated my armor 
 the armor as if sighing let out a hiss of steam from the electro-boilers and rose up, the gage on my right said that I had full signal to the black towers that loomed over the battlefield supplying unlimited wireless power to our armor. The bar on my left showed enough water in the tanks for 40 minutes of operation time.I was ready. 
 
 Today ’ s assignment was defense, we were to move from our bunker up the road to the primary substation to provide extra support for the electrician squad so that they could make the necessary upgrades to the lines for our magnetic casters. 
 
 The magnetic casters were a relatively new invention. These artillery pieces were nothing like the ballestas and catapults of old. They sat behind the mountains over 30km away and used magnets to launch giant molten balls the size of a man, burning the enemy alive. It was a sight to behold unlike our Zeus lances that shoot lightning from their tip disintegrating any who had the misfortune to be out of their faraday suits the molten metal would cool rapidly leaving its victims encased in their dying throws for all eternity. Our commander said to look on the bright side if we did get hit we would be dead in an instant unlike victims of arrows who would suffer for weeks before finally succumbing to their injury ’ s 
 
 Lifting our mirror shields and Zeus lances my squad and I clanked our way from the safety of the concrete bunkers and faraday nets and into the haze. The new recruit at the rear, smelling the mix of ozone and chard flesh that hung heavy over the battle field, saw the second coming of his lunch. Poor kid, now his suit would smell like that for the next few weeks. 
 
 My radio crackled to life 
 “ Sir, Intel reports enemy laser rifle squads are approaching the substation command wants us there ASAP ” 
 “ Roger, get the squad on the transport ” 
 
 We lumbered over to the flat bed that would take us to the target and climbed inside, 
 As we began the hour drive to the site, I dozed off, this suit had become like second skin during the 2 years our squad had spent fighting the enemy here. 
 
 for reference 
 [ wireless electricty ] ( http: //www.livescience.com/46745-how-tesla-coil-works.html ) 
 [ faraday cage ] ( http: //en.wikipedia.org/wiki/Faraday_cage ) 
 [ railgun ( magnetic casters ) ] ( http: //en.wikipedia.org/wiki/Railgun ) 
 
 this is my first time writing a prompt, constructive criticism would be greatly appreciated
