Can anyone provide greater context for the numbers quoted at the battle of Cannae? Best I can see is the ancient historians said Romans raised emergency legions of 5000 men and 16 legions were present, so it's just 16 x 5000 for 80000 Roman soldiers at the battle.
But 1. Ancient historians are well known for inflating number, 2. These guys weren't there, 3. They didn't raise 16 emergency legions right? Some of those legions had been raised prior at 4000 men and had undoubtedly suffered some casualties.
And you generally would not dilute a veteran legion with green recruits. Its better to have a block of 2000 or 3000 who have stood in battle together before than to have 4000 or 5000 with half of them unsure of what they're about to experience.
I saw a YouTube video that was well researched and interviewed a historian who has done extensive work on the battle. They mention 8 emergency 5000 man legions being raised iirc. That's 40000 men. But then they don't make any estimate about the actual size of the other 8 legions. If they started at 4000 and on average suffered 25% casualties fighting Hannibal (survivors and ransomed captives from Trasimene for example) we're talking a strength of 24000 from these legions.
All told that would be 64000 men. Minus two legions it is said were left to guard the camp and we're at 54000 to 58000 depending on which legions were left to guard (2 of the new larger 5000 man legions or some smaller previously existing group).
I haven't gotten to this bit in Livy yet but it did strike me as odd that it seems nobody questions the idea that the ancient authors said 16 legions of 5000 men were present. Especially when you consider the terrain and other details of the battle where a force this size strains credulity as far as how they would have not only fit in the space the battle might have taken place in, but been encircled so effectively.















