So, i've played Rome: Total War for so long I can't even remembered when I started- and I have found some units you probably have never encountered...
10: Bull Warriors- A Spanish heavy infantry unit that is very mobile for its stats: DEF-12 ATK-13 CHR-4 MISSLE-17
9: Heavy Spearmen- Armenian phalanx unit, great versus cavalry and lighter spear units: DEF-17 ATK-7 CHR-3
8: Armenian Legionaries- Armenian roman unit, rarely occurs in the game due to Armenia being destroyed by Pontus: DEF-16 ATK-7 CHR-2 MISSLE-11
7: Numidian Legionaries- Just like Armenian legionaries, but for Numidia: DEF-16 ATK-7 CHR-2 MISSLE-11
6: Night Raiders- German shock infantry. Lightly armored but fine against heavy infantry: DEF-10 ATK-14 CHR-6
5: Judean Zealots- Basic desert spearmen only available to the Rebels around Jerusalem: DEF-7 ATK-11 CHR-6
4: Head Hunting Maidens- Scythian female heavy cavalry. Good versus light cavalry and legions: DEF-11 ATK-10 CHR-8
3: Gothic Cavalry- German heavy/shock cavalry. Excellent versus nearly all other cavalry, excluding cataphracts: DEF-19 ATK-12 CHR-7
2: Decere- Scipii Heavy ship, that can only be recruited at a Pantheon (Nike): DEF-13 ATK-16 CHR-1
1: Cataphract Archers- Okay, I've NEVER seen this unit in the game. EVER. Armenian heavy archer Cavalry(?). Can put up a fight even if engaged, but slow moving. DEF-22 ATK-9 CHR-5 MISSLE-7