An American Weeb Gets Sent to 13th Century Poland and Think's he's in an Isekai

Brendan Flannagan wakes up with his face in a pile of cow dung. Instead of being mad at having poop in his mouth, he exalts in glee, because he's just been Isekai'd like in Konosuba.

He later learns (the hard way) that he's not actually been Isekai'd, but sent back in time to Medieval Europe. Many trials and tribulations await Brendan, as the local royalty fights mindlessly over fiefdom squabbles, the general public dies of everything possible, and then the lust for war constantly over takes everyone's general countenance, because the fresh wounds of the crusades is still on everyone's conscious.

Hello - I don't know who you are, or why you're reading this, but for you, I hope for just one thing: please enjoy the story, because if you don't, it will blemish my ego. I'm a delusional narcissist that forgets to wash his hands at least once a day after using the ...