Same reason they always invent new weapons - to help them win. Superior weapons go a long way to help win a war. America has ruled the world because of superior fire power.
More powerful weapons
disarmament
because of military use.
because there was a war
He didn't really invent weapons however, he did invent musical instruments, hydraulic pumps, reversible crank mechanisms,finned motor shells, and a steam cannon.
Yes Leonardo did invent the scissors... -Taylor D. S. Age:11
Tank, scaling ladder, cluster bombs, ...
You cannot INVENT something which already exists. Leonardo studied the structure.
No. Only Leonardo.
A kind of.
no
No
In 1502-03.
No.
No
No