kahn

It is said Julius Caesar was planning new campaigns in the east but fell to assassin daggers. What would he have accomplished? Seeing his military ingenuity in North Africa, Spain, Gual, and Britania the one escaped him was the east. He was in the east as a younger military official but not in the level of his western crusades.

I'm curious, the Roman-Persian wars were the largest throughout the entire ancient world spanning 4 centuries, dwarfing the Graeco-Persian wars. The Persians were projected through the Parthian dynasty and later the Sassanid dynasty which Rome could never subdue on their own turf meeting tactics they were unnacustomed to of mounted archers on hill terrain, a foreshadowing of the growing medieval cavalry advantage. Nonetheless over 4 centuries Rome and Persia battled it out, raiding fortresses and armies, one never being able to dominate the other, eventually all that energy was lost as the Arabs of the medieval ages took over that territory, i've always wondered what Caesar would have done.

Belisarius

I don't think he would have accomplished any more than Trajan, Hadrian, Marcus Aurelius, Septimus Severus, or Julian did. All of these were comparable in military ability with Julius Caesar.

Julian was the most successfull of the above as he took the Persian capital of Ctesiphon and did an "Alexander" by marching deep into the Persian empire in pusuit of the king. Unfortunately he died before he could complete the job and his sucessor was defeated.

Macedonia Superior

I can ask the same question about Alexander the Great...
What he could have done if turned his troops to the west.

Himanil

This isn't about Alexander. Well firstly he'd try to fulfill his dream of fully subjugating Britain after which he'd probably try a hand at the Germans once he'd settled things after becoming emperor.