Index card 11

http://riv.co.nz/rnza/hist/gun/firstgun.htm

Guns were first made from forged iron into bombards. Cast iron guns were cheaper, but weren't manufactured untill the end of the 15th century and often expoded when used. Bombards, howitzers and mortors were the first artillary with a short round barral aimed at a high angle to lob over castle walls.