YOU SAID:

have been involved in numerous secret raids on Al-Quaeda, and have over 300 confirmed kills.

INTO JAPANESE

アル Quaeda の多数の秘密の襲撃に関わっているし、確認を殺す以上 300 があります。

BACK INTO ENGLISH

300 or more confirmed kills, and are involved in many secret raids of Al Quaeda.