WThe Achaemenid conquest of the Indus Valley refers to the Achaemenid military conquest and occupation of the territories of the North-western regions of the Indian subcontinent, from the 6th to 4th centuries BC. The conquest of the areas as far as the Indus river is often dated to the time of Cyrus the Great, in the period between 550-539 BCE. The first secure epigraphic evidence, given by the Behistun Inscription, gives a date before or about 518 BCE. Achaemenid penetration into the area of the Indian subcontinent occurred in stages, starting from northern parts of the River Indus and moving southward. These areas of the Indus valley became formal Achaemenid satrapies as mentioned in several Achaemenid inscriptions. The Achaemenid occupation of the Indus Valley ended with the Indian campaign of Alexander the Great circa 323 BCE. The Achaemenid occupation, although less successful than that of the later Greeks, Sakas or Kushans, had the effect of acquainting India to the outer world.
WThe Avanti-Magadhan wars were fought between the ancient Indian empires of Magadha and Avanti for domination over much of North India.
WThe Babylonian revolts of 484 BC were revolts of two rebel kings of Babylon, Bel-shimanni and Shamash-eriba, against Xerxes I, king of the Persian Achaemenid Empire.
WThe Bosporan Kingdom waged a series of wars of expansion in the Cimmerian Bosporus and the surrounding territories from around 438 BC until about 355 BC. Bosporan expansion began after Spartokos I, the first Spartocid took power and during his seven-year reign, established an aggressive expansionist foreign policy that was followed by his successors.
WThe Sicilian Wars, or Greco-Punic Wars, were a series of conflicts fought between Ancient Carthage and the Greek city-states led by Syracuse, Sicily, over control of Sicily and the western Mediterranean between 580–265 BC.
WThe helots were a subjugated population that constituted a majority of the population of Laconia and Messenia – the territories comprising Sparta. There has been controversy since antiquity as to their exact characteristics, such as whether they constituted an ethnic group, a social class, or both. For example, Critias described helots as "slaves to the utmost", whereas according to Pollux, they occupied a status "between free men and slaves". Tied to the land, they primarily worked in agriculture as a majority and economically supported the Spartan citizens.
WThe Warring States period was an era in ancient Chinese history characterized by warfare, as well as bureaucratic and military reforms and consolidation. It followed the Spring and Autumn period and concluded with the Qin wars of conquest that saw the annexation of all other contender states, which ultimately led to the Qin state's victory in 221 BC as the first unified Chinese empire, known as the Qin dynasty.