Chariot-borne archers became a defining feature of Middle Bronze Age warfare, from Europe to Eastern Asia and India. However, in the Middle Bronze Age, with the development of massed infantry tactics, and with the use of chariots for shock tactics or as prestigious command vehicles, archery seems to have lessened in importance in European warfare. In approximately the same period, with the Seima-Turbino Phenomenon and the spread of the Andronovo culture, mounted archery became a defining feature of Eurasian nomad cultures and a foundation of their military success, until the massed use of guns. In China, crossbows were developed, and Han Dynasty writers attributed Chinese success in battles against nomad invaders to the massed use of crossbows, first definitely attested at the Battle of Ma-Ling in 341 BC.