These are referred to as deterrents. The Arms Race, a part of the Cold War, was based on mutual deterence. Neither side could hope to overwhelm the other with the weapons they had.
Deterrence
Build a strong military to prevent attacks from other countries.
militarism
Rosie the Riveter, (a name used to describe every woman working in a factory in WWII), built the tanks, ships, planes, and other weapons used by the men to kill the Germans, Italians, and Japanese on the battlefield. Without the weapons built by the women, the men would have had to fight the Axis with their bare hands, or men who could serve in the Armed Forces, would have had to stay back in the USA and build the weapons used.
The Phoenicians lasted quite a while, and well into the Iron Age, so they doubtless had iron weapons.
detterence
Deterrence
Eventually there were so many nuclear weapons, total destruction of the Earth was possible. The term "Mutually assured destruction (MAD)" was used to describe the resulting holocaust.
the four forces
True.
To get nuclear weapons, you must build the Manhattan Project.
The Spanish built defensive walls and fortifications around Trujillo to protect it from attacks, as well as established a military presence in the city. They also implemented surveillance measures and checkpoints to monitor movement in and out of the city to thwart potential threats.
Weapons are not usually a tool used in any building project.
you cant
almost anyone that can get the materials
Why did in Shihuangdi build the great wall of china
either a build up of nuclear weapons, or a buildup in conventional weapons