Yes, the counter has ticked to 200 years. Now, as to resolve with a definite answer to the Legion Ranks. 

The First empire ran with the Ranks you listed Cale, using a mash-up of Roman and European-Medieval Kingdom ranks to define their troops. However after the fall of the first empire and after the events of Jagar Thorn, the Empire rebuilt to alienate magic from it's ranks and abolished the European-Medieval ranks, leaving the lone style of Roman to bolster it's regime. 

They are as follow:

-Recruit
-Legionnaire
-Captain
-Commander
-Legate
-General

Now, there are certain sub-sects and special diversions of the Imperial troops, those are:

-Imperial Archers
-Imperial Horsemen/Cavalry
-Torturers
-Penitus Occulatus

The Empire, after it's first fall, cut it's ranks design down to simplify everything, but in turn made it more efficient among the ranks of it's men and women.