You've played MTW2 too much if you start making references in a real history discussion. For example:

Teacher: "Medieval times were quite rough on the commoner..".

Me: "Yes, it must have been annoying taking so many years just to travel from France to Denmark..."

Teacher: "What?"

Me: "What was really interesting, was when the Pope got killed by an Assassin and got replaced with a Spanish Cardinal, causing tension between the church and the Danes."

Teacher: "Wait, what are you talking about..."

Me: "Actually, what i wanted to ask you about, was when Denmark had taken Jerusalem back from the Mongols, how did they manage to maintain a siege there for so many years without any supply lines?"

Teacher: "........Get out of my classroom."