This is the 3222nd most frequent Chinese word.
兵团
"兵团" means "army corps" or "military unit."
In this sentence, '兵团' refers specifically to a military unit engaged in tasks.
兵团已经完成了新的训练任务。
The corps has successfully completed the new training task.
Here, '兵团' is used metaphorically to describe a well-organized group formed for medical tasks.
为了防止疫病传播,当地成立了医疗兵团。
To prevent the spread of the epidemic, a medical corps was established locally.
In this context, '兵团' is used in a fictional setting, representing a customizable group in gameplay.