"You finally figured out how to use rain to counter firearms?" Lynn looked up at the rain pouring down. Several mages had formed a rainmaking array, drawing water from the nearby river to create an effect that could keep raining as long as they had magic power. "This is a bit of a problem. We only have a dozen or so cannons, and cannons are vulnerable to rain, but is that really enough? If we spread them out, they can fire twice a minute, three times at most. After three minutes of bombardment, they'll need to cool down."
"At least we can still use grenades."
"Wait, I think my silk is rainproof. After all, this stuff is Artificial Silk—in plain terms, it's plastic fabric. So it's basically a rain tarp."
Then Lynn shouted down to the people below, "Hunter Battalion! Those equipped with Rifled guns, fire through the loopholes! Everyone else, get over here! Go to the armory and grab shields to protect them, then grab waterproof cloth—the silk! If there isn't enough, take off your own clothes! The outer layer is waterproof too! Hurry and help shield them from the rain!"
"Cover the cannons with waterproof cloth too! Then aim at the enemy's crossbows and catapults!"
"Prioritize the enemy siege weapons. Fire at will!"
Ingrained assumptions could be deadly. During the First World War, Great Britain had lost eighty thousand men in a single day to dense charges. People in this era had some familiarity with firearms, but Matchlock Guns and cannons were fired using matchcords, and cannons had to be loaded by hand, with the gunpowder charge measured by feel.
When they saw shields protecting the musketeers, they prepared to aim their crossbows and catapults at them. But then they saw something they couldn't understand: the people