Although in 0 A.D. pikes are visibly longer than spears, they're represented shorter than the were in reality. When zooming in, it seems 0 A.D.'s pikes are about twice as long as the men: Let's say a man is 1.8 m tall, then these pikes are 3.6 m. We know from Hellenistic authors pike length varied over time (I posted a summary in this post), but even the shortest (4.8 m) were a third longer than 0 A.D.'s, and the longest (7.68 m) over twice as long. I vaguely recall humans being abou