Following this conversation, Soldier 1 pondered this conundrum, and lobbied the powers at be to use BCE to avoid the perplexing question

Explanation: In reality, of course, Romans had their own dating system, typically using either the ruling consuls (elected officials) for the year, or, less commonly, the number of years since Rome was founded (Ab Urbe Condita, AUC). BC/AD wasn’t invented until the 6th century AD.