Late Roman Unit Sizes

[Nathan Ross]

But much like on the Danube, V Macedonica had small one or two century large detachments all over Egypt at Antinoupolis, Panopolis, etc. etc.

Possibly. Although the ND scrupulously lists all the various stations of the other legions in Egypt and the Thebaid - all have multiple garrisons, just as do the legions on the Danube. But there is only one post listed for V Macedonia - Memphis. Are there papyri mentioning other stations of this legion, do you know?

This could just have been because the unit was so small - Zuckerman's suggestion that it was the descendant of the (single-cohort?) vexillation of the Danubian legion brough to Egypt by Galerius in c293 seems quite plausible. In that case, of course, it wouldn't tell us much about the size of the other legions in the province!