Within the Indo-Greek Kingdom there were over 30 kings, often in competition on different territories. Many of them are only known through their coins. Many of the dates, territories, and relationships between Indo-Greek kings are tentative and essentially based on numismatic analysis (find places, overstrikes, monograms, metallurgy, styles), a few Classical writings, and Indian writings and epigraphic evidence. The following list of kings, dates and territories after the reign of Demetrius is derived from the latest and most extensive analysis on the subject, by Osmund Bopearachchi ("Monnaies Gréco-Bactriennes et Indo-Grecques, Catalogue Raisonné", 1991). Eastern territories The descendants of the Greco-Bactrian king Euthydemus invaded northern India around 180 BC as far as the Punjab. Demetrius I (reigned c. 200–170 BC) Son of Euthydemus I. Greco-Bactrian king, and conqueror of India. Coins The territory ruled by Demetrius, from Bactria to Pataliputra, was then separated between western and eastern parts, and ruled by several sub-kings and successor kings. The Western part made of Bactria was ruled by a succession of Greco-Bactrian kings until the end of the reign of Heliocles around 130 BCE. The Eastern part, made of the Paropamisadae, Arachosia, Gandhara and Punjab, perhaps as far as Mathura, was ruled by a succession of kings, called "Indo-Greek": Territories of Paropamisadae to Mathura (house of Euthydemus) Agathocles (190-180 BC) Coins Pantaleon (190-185 BC) Apollodotus I (reigned c. 180–160 BC) Antimachus II Nikephoros (160-155 BC) Coins Demetrius II (155-150 BC) The usurper Eucratides managed to eradicate the Euthydemid dynasty and occupy territory as far as he Indus, between 170 and 145 BCE. Eucratides was then murdered by his son, thereafter Menander I seems to have regained all of the territory as far west as the Hindu-Kush Territory from Hindu-Kush to Mathura (150 - 125 BCE) Menander I (reigned c. 150–125 BC). Successor to Apollodotus. Married to Agathocleia. Legendary for the size of his Kingdom, and his support of the Buddhist faith. Coins Agathokleia (r.c. 130-125 BCE), Probably widow of Menander, Queen-Mother and regent for her son Strato I. Coins After the death of Menander I, his successors seem to have been pushed back east to Gandhara, losing the Paropamisadae and Arachosia to a Western Indo-Greek kingdom. Some years later the Eastern kings probably had to retreat even further, to Western Punjab. Territory from Gandhara/Western Punjab to Mathura (125 - 100 BC) Strato I (125 - 110 BC) Coin, son of Menander and Agathokleia Heliokles