spear or sword
The 'hoplites' of Archaic Age Greece were armed as spearmen, and therefore relatively easy to equip and maintain.
The principal offensive weapon was the boats torpedoes. Typically, the primary function was to take out enemy ships.
In World War 2 the Germans introduced the V2 rocket, a terrifying new offensive weapon. In WW1 poison gas was considered the most terrifying weapon.
A submarine can be used as either a defensive or offensive weapon. Also note that it is often classified as a deterrent weapon.
Because he had the knife illegally, he was charged with being in possession of an offensive weapon.
Mainly spear and shield. Spartan hoplites (infantry) used relatively short swords (xiphos) as a secondary weapon.
No,but you can hold a secondary weapon in your hand and a primary weapon on your back,or a primary weapon in your hand and a secondary in your holster.
No, a push dagger is considered to be a double sided edged weapon and these are not legal in Pennsylvania. This is an offensive weapon in the state of Pennsylvania and you could do jail time or be fined if you are caught carrying one.
a ninjato or a shrukien
whip
The Greek Xiphos I imagine must have been the most widely used weapon, that is after the spears of the hoplites.
The sea itself could be considered her weapon, for she controlled it - with that, she needed no weapon.