SOLVED. Fantasy book where guy gets teleported to a new planet but the dude has blacksmith knowledge and builds a rifle and cannons when he gets drafted to fight a war. He also has a sword that everyone thinks is magic. [s]

[Patrick]

He also becomes a wizard or something.

[Sue]

This is reminiscent of the Cast Under an Alien Sun series.

I seem to remember that the character who was teleported develops weapons to help fight a war, but I’m not sure about the other points you mention.

[Patrick]

No

[Sue]

"Lord Kalvan of Otherwhen (aka Gunpowder God)?by Beam-Piper?
He doesn't forge guns and cannons, but knows how to make gunpowder; which in this world is a secret of the priests.https://www.fantasticfiction.com/p/h-...

[Patrick]

Randomly remembered it. Sword of the bright lady series

[Kris]

Glad you found your book series, Patrick. Here's the link for the first book - Sword of the Bright Lady by M.C. Planck.