Please note that Mommsen uses the AUC chronology (Ab Urbe Condita), i.e. from the founding of the City of Rome. You can use this reference table to have the B.C. dates
But he came not, as Roman commanders-in-chief had been wont to
make their appearance in the East. That his army of five legions
or of at most 30,000 men,(14) was little stronger than an ordinary
consular army, was the least element of difference.
14. We must recollect that after the outbreak of the Social War
the legion had at least not more than half the number of men which it
had previously, as it was no longer accompanied by Italian contingents.
Formerly in
the eastern wars a Roman fleet had never been wanting, and had in
fact without exception commanded the sea; Sulla, sent to reconquer
two continents and the islands of the Aegean sea, arrived without a
single vessel of war. Formerly the general had brought with him a
full chest and drawn the greatest portion of his supplies by sea
from home; Sulla came with empty hands--for the sums raised with
difficulty for the campaign of 666 were expended in Italy--and
found himself exclusively left dependent on requisitions.