Re-eneactors focusing too much attention on the principate?

[jkaler48]

One factor involved in making the first century AD popular is the difficulty of gathering the number of people needed to form the basic maneuver element of the Roman Legion; the century ( 80 - 84 reenactors). It takes that to do a "proper" demonstration of roman tactics. In the US we are lucky to scrape by at the larger events mustering a little more than a half century. Some day there will be enough interest to support groups from more periods at the century level.
As others have pointed out equipment availability has an influence on decisions about period so more gear from other periods should gradually increase interest.