The hittites were the first society to use this as a weapon.
tank
cannon
chariot
gunpowder

The correct option is "Chariot"

Hatti or Hittite Empire was a state of antiquity that originated Syrian seventeenth century BC. C. and succumbed circa the 12th century BC. C. They were a dominant power in Anatolia, where its central political nucleus and other peripheral territories were located. During the centuries XIV and XIII a. C. incorporated a large number of anatomical vassals in the West and controlled large areas of northern Syria, reaching the Euphrates River. His politico-military organization was complex.

Its capital was Hattusa. They spoke an Indo-European language, written with hieroglyphics or cuneiform characters taken from Assyria. His kingdom brought together many city-states of very different cultures and came to create an influential empire thanks to his military superiority and great diplomatic skills, which was the "third" power in the Middle East, along with Babylon and Egypt . They perfected the light tank and used it with great success. One of the first uses of iron in the Middle East is attributed to them to make weapons and luxury objects. After its decline, they fell into oblivion until the 19th century.

ok sorry the answer is a. by their religion

b) the confederacy had to pay all union war expenses.