Here is my logic, say Qin Dynasty China is destroyed or at least does not unite China, the Xiongnu do not get forced out by the Qin and Han Dynasties (who were butterflied). The Xiongnu staying butterflies the Huns (theoretically, I am aware this is a point of contention), which means no hunnic invasion of Europe, no tribal confederacies, and no major external threats to Rome?
Does my logic make any sense?
Does my logic make any sense?