Place the following events in sequence: A) Julius Caesar conquers Gaul; B) Caesar leads his army into Rome; C) Caesar revises the Roman calendar

Cesar revises the Roman calendar is first then I’m pretty sure he lead his army into Rome and then he conquers Gaul If not then it’s Cesar revise is the Roman calendar then Julius Caesar conquers Gaul then Cesar leads his army into Rome

What does this mean ? ?