One who opposes military ideals, war, or military preparedness and instead seeks settlement of disputes by arbitration is called a(n) . garrison activist pacifist arbitrate

pacifist

Explanation:

Pacifist-

It refers to the person , who is against the concept of fighting or war , is referred to as a pacifist .

The term is related to the concept of ahimsa , i.e. , not to harm anyone , which is given in the philosophy of Jainism , Buddhism , Hinduism .

The method uses some other concept which enables to avoid the situation of violence and war .

Hence , from the given scenario of the question ,

The correct answer is pacifist .

answer; society;

answer; no longer than a reasonable period of time;