Seleukidai Faction: In each Seleukeia, Antiocheia, Alexandreia, Pella and Bactra, I station two Hetairoi squadrons, four Hypastistai, four Argyrispidai (two Phalangites, two Thorakitai), four Pheraspidai and between two to four archers of Persian or Syrian stock.
Iranian dominions: Four Klerouchikon Phalangitai, four Nizag Gund battalions and four Persian archer companies.
Asia Minor provinces: Mostly four Hoplites units and two archers units of either Greek or Syrian stock. Spearmen levies in Galatia.
Levantine provinces: Phalangitai, Jewish militia and Syrian archers.
Egypt, Nubia and eastern Libya. Phalangitai, Jewish militia, Hoplites and Toxotoi.
Hellas, Macedonia, Thrakkia and Illyria: Hoplites and Toxotoi.
Italy, Sicily, Sardinia and Corsica: Hoplites, Samnites, Hastati, and Toxotoi.
North African conquests: Phalangitai, Hoplites, Jewish militia, Samnites and Toxotoi.
Indian conquests: Phalangitai and Hindu spears and bowmen.
Armenian conquests: Phalangitai and Scythian foot archers.
Asian Steppe conquests: Phalangitai and Persian Archers.
Arabian conquests: Phalangitai, Jewish militia, Nizag Gund and Payadag.
Qart-Hadast Faction.
Carthage and Thapsus: Four Sacred Band cavalry, four Sacred Band infantry and eight citizen militia.
African provinces: Poeni militia, and Libyan soldiers.
Sardinia and Corsica: Poeni militia and Punic-Libyan troops.
Sicily: Libyan troops, hoplites and toxotoi.
Rhegion, Italy: Libyan troops, Samnites and Toxotoi.
Iberian territories: Punic-Libyans, Iberi milites Caetrati and Lusattanon mercs.
Crete: Hoplites and Toxotoi.
Thermon, Hellas: Libyans, Hoplites and Toxotoi.
Massilia, Gaul: Punic-Libyans, Massilian hoplites and Toxotoi.
I must also say that as well as erect watchtowers to keep vigilant of bandit activity, I also muster and team up squadrons of light cavalry in all of my games to seek and eliminate rebel groups operating within my borders.