Stop all this, Ottomans, Seljuk, Rashidun, Umayyad, Rum, and the Germanic tribes!
Without you, the Byzantine empire would have reunited Rome! Which is a good thing, because I loooove the Roman empire! And about where the Byzantine Empire would be in WW1, okay, so ottomans were nonexistent, ottomans are byzantine’s enemy, ottomans were central, so Byzantine would be allied, and prob not change in WW2, would be allied or non-participant. If I am the first person to create a time machine, I would use it to go back in time with the U.S. military and drop a whole bunch of bombs on Edirne.