Share This Article 1. The counterweight trebuchet arrived in England when Prince Louis of France besieged this castle in 1216. Windsor Castle Dover Castle Carlisle Castle Hetford Castle 2. In 536 AD, this man reconquered the city of Rome for the Byzantine Empire. Flavius Belisarius Desiderius Ambrosius Aurelianus Flavius Stilicho 3. The last American ground-combat unit left Vietnam in this year. 1973 1975 1972 1970 Loading …