Muscle-powered personal weapons (Meleé)
Armor etc.
Small arms firearm
medieval siege weaponry
ammunition
Military unit
Communications
Military vehicles[?]
Aircraft (For a list of individual military aircraft types, see aircraft types.
Fortification
Doctrines
... is positive, then there are two different solutions x, both of which are real. (Geometrically, this means that the parabola intersects the x-axis in two points.) If the ...