This is the 17932nd most frequent Russian word.
учениях
"Учениях" means "exercises" or "training sessions" in English.
In this sentence, "учениях" refers to a series of training exercises or drills conducted by military personnel.
На прошлой неделе военные участвовали в крупных учениях.
Last week, the military participated in major drills.
Here, "учениях" is used to refer to educational or training exercises aimed at developing skill sets.
Студенты активно работали над учениями для улучшения своих навыков.
The students actively worked on exercises to improve their skills.
"Учениях" in this context implies organized activities for learning procedures related to emergency handling.