the Ravi River began to mint new coinage depicting military victories. The most prominent entities to form were the Yaudheya Republic, Arjunayanas, and the Audumbaras. The Yaudheyas and Arjunayanas both are said to have won "victory by the sword". The Datta dynasty and Mitra dynasty soon followed in Mathura. The Indo-Greeks ultimately disappeared as a political entity around 10 AD following the invasions of the Indo-Scythians, although pockets of Greek populations probably remained for several centuries longer under the subsequent rule of the Indo-Parthians and Kushans. Background Initial Greek presence in the Indian subcontinent Greeks first began to settle the Northwestern part of the Indian subcontinent during the time of the Persian Achaemenid empire. Darius the Great conquered the area, but along with his successors also conquered much of the Greek world, which at the time included all of the western Anatolian peninsula. When Greek villages rebelled under the Persian yoke, they were sometimes ethnically cleansed, by relocation to the far side of the empire. Thus there came to be many Greek communities in the Indian parts of the Persian empire. In the Fourth Century BC, Alexander the Great defeated and conquered the Persian empire. In 326 BC, this included the northwestern part of the Indian subcontinent as far as the Hyphasis River. Alexander established satrapies and founded several settlements, including Bucephala; he turned south when his troops refused to go further east. The Indian satrapies of the Punjab were left to the rule of Porus and Taxiles, who were confirmed again at the Treaty of Triparadisus in 321 BC, and the remaining Greek troops in these satrapies were left under the command of Alexander's general Eudemus. After 321 BC Eudemus toppled Taxiles, until he left India in 316 BC. To the south, another general also ruled over the Greek colonies of the Indus: Peithon, son of Agenor, until his departure for Babylon in 316 BC. Around 322 BC, the Greeks (described as Yona or Yavana in Indian sources) may then have participated, together with other groups, in the uprising of Chandragupta Maurya against the Nanda Dynasty, and gone as far as Pataliputra for the capture of the city from the Nandas. The Mudrarakshasa of Visakhadutta as well as the Jaina work Parisishtaparvan talk of Chandragupta's alliance with the Himalayan king Parvatka, often identified with Porus, and according to these accounts, this alliance gave Chandragupta a composite and powerful army