Editing 5th century BC (section)

==Inventions, discoveries, introductions==
*[[Cast iron]] is first used in the Chinese [[Wu (state)|Kingdom of Wu]] with the innovation of the [[blast furnace]], and soon becomes widespread for agricultural tools and weapons during the [[Warring States]].
*[[Trebuchet]] [[catapult]] is first used by followers of the Chinese philosopher [[Mozi]].{{Citation needed|date=August 2022}}
*The Greeks invent the [[Anchor]] with flukes.
*The Greeks start to use [[shear legs|shear-leg]] cranes for construction and loading of ships.
*The Greeks invent [[linear perspective]].
*The Greeks develop an indirect lost wax process for casting [[bronze]].
*The Chinese [[hydraulic]] engineer [[Ximen Bao]] (西門豹) oversees an enormous [[canal]] system for agricultural [[irrigation]], while employed by [[Marquis Wen of Wei]] (文侯) ([[445 BC]]–[[396 BC]]).
*The Chinese philosopher [[Li Kui (legalism)|Li Kui]] writes the ''Book of Law'' (Fajing, 法经) in [[407 BC]], the basis for the law codes of the following [[Qin dynasty]] and partially that of the [[Han dynasty]].
*Scholars commonly accept that the Hindu text the Bhagavad Gita was written.
*Creation of the [[Berlin Foundry Cup]] (early 5th century).
*The oldest known [[Maya calendar]]