Given the task definition and input, reply with output. In this task, you are given a sentence in the English language and your task is to convert it into the Japanese language. In translation, keep numbers as it is and make it sentence case (capitalize only the first word of each sentence and noun).

Militants carried out several retaliatory attacks last month that killed hundreds of people.

武装集団は先月何度か報復的攻撃を遂行しており、何百人もの人々が殺害された。