To Baby Girl; Re; What happened after Christ's crucifiction.?

The information I provided was gotten from books I read ages ago. I have studied a lot of history. Countless books, so many, that I would find it difficult to give a bibliography. And as for websites- books are still the champion. However there is something I would like to find out if anyone knows or anyone can point me in the right direction. Who can point me to the RANK INSIGNITURE(what they wore to signify rank) of the Roman Military. Any help would be greatly appreciated.