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Dukes without the military rank of Great General usually hold the rank of General, equivalent to a Maj. Gen. with actual authority like Tu Yuan, who normally could control several army groups, each with a force of about one hundred thousand.
Marquises could command an army group, with the command sequence under them managed by Earls.
Of course, there were also some Earls with substantial backgrounds and distinguished military services who could independently command an army group.
Such Imperial Earls, either had a good father and were the legitimate son, or were military talents with prospects of being promoted to Marquis or Duke. And such an Imperial Earl, who at that time was only piloting the 16th generation standard-type Mecha modified model from Ji Xinghe, helped Jackson kill one, and for this reason, Jackson had reaped a lot of military achievements earlier and got a better Mecha.
