Warfare

Warfare is the activity of fighting a war, often including the weapons and methods used [Cambridge Dictionary].
The term encompasses weapons, weapons systems, or platforms employed for the attack in an armed conflict.
This term generally refers to the physical means belligerents use to inflict damage on their enemies during combat. As such, the term encompasses all weapons, including weapons systems and delivery platforms. To minimize the effects of armed conflicts on combatants, civilians, and the environment, IHL’s fundamental principles, particularly the prohibition of superfluous injury or unnecessary suffering, operate to prohibit certain weapons and to restrict the use of others. For example, there are treaty bans prohibiting using laser weapons, biological weapons, chemical weapons, and anti-personnel landmines. There are treaty restrictions on anti-personnel land mines (for states not bound by the treaty banning their use outright), anti-vehicle mines, explosive remnants of war, and fragmentation weapons.
Warfare is generally understood to be the controlled and systematic waging of armed conflict between sovereign nations or states, using military might and strategy, until one opponent is defeated on the field or sues for peace in the face of inevitable destruction and greater loss of human life [Casebook].

Sources:

Warfare. Cambridge Dictionary. Retrieved from: https://dictionary.cambridge.org/dictionary/english/warfare

Means of warfare. Casebook. Retrieved from: https://casebook.icrc.org/glossary/means-warfare