[1] https://www.youtube.com/watch?v=ZC8JcWVRFp8&list=PL77A337915...
I would then look into Carthaginian wars, famous general Hannibal and his fate. This was a crucial period when Rome was competing with Carthage for the top spot and at times it looked quite dire for Rome as Carthage had an upper hand.
Next interesting period would be Julius Ceazar and especially what happened after his death when his generals were battling to inherit his empire which eventually led to the split into eastern and western Romans. This split later continued when Christianity became mainstream religion and lead to Byzantine Empire.
You can look into the sack of Constantinople and wonder what would happen if Western Christians didn’t sack and destroy Eastern Christians allowing Islam to take over the region.
And then we come to the German rise as German lands become the heart of the indirect continuation of the Roman Empire in the form of Holy Roman Empire.
I don't have anything more specific about later history, but the spice trade and the Orient Express are two (I think) fascinating pieces of history that tie Western Europe to North Africa and eastern Asia. The history of the Crusades is also integral to understand the mixing of these areas... Europe wouldn't have cared if they didn't think east Asia was "theirs" in some way.
The History of Byzantium podcast picks up right where the History of Rome left off. It's mostly about the east Roman empire, but also covers the all its neighbors.
They created some amazing architecture and culture in Southern Spain.
So either the Umayyads had no use for camels or Dr Green's research doesn't include records from the period.