Who is the Roman senator and general who instituted a number of military reforms

Who is the Roman senator and general who instituted a number of military reforms.

Who is the Roman senator and general who instituted a number of military reforms around 90 BCE?
Answer is within the following vocab:
Cyrus the Great
Archimedes
Constantine I
Darius the Great
Hoplites
Homer
Satraps
Sparta
Virgil
Claudius Ptolemy
Legions
Etruscans
Zoroastrianism
Spartacus
Julius Caesar
Ahuramazda
Marathon
Octavian (Augustus Caesar)
Olympic Games
Plato
Sassanid
Pericles
Phillip II
Paul of Tarsus

Who is the Roman senator and general who instituted a number of military reforms

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