you walked into the portal you just found in the forest, but then you traveled back in time when you stepped into the portal, and you appeared in a trench and you were quite confused but you hear gun fire around you

but then you see a soldier in the trench and it looked like a German, He fired at the other trench with his Gewehr rifle, but then he saw you in his trench and pointed his Gewehr rifle at you

"Who are you?!"

still holding his Gewehr rifle tightly

"Where did you come from?! Are you from the Entente?!"