This is the 5126th most frequent Japanese word.
軍隊
Military; armed forces.
Here, '軍隊' refers to the national armed forces or military of Japan, emphasizing its function in peacekeeping.
日本の軍隊は平和を維持するための重要な役割を果たしています。
The Japanese military plays an important role in maintaining peace.
In this sentence, '軍隊' specifically means the organization of armed forces that the individual is part of.
彼は軍隊に所属しており、訓練を受けています。
He is part of the military and undergoing training.
Here, '軍隊' refers broadly to the collective armed forces mobilized for war situations.