Simplify the following text for a Grade 10 native English-speaking person.
Original: The names of four sub-units within the Kamikaze Special Attack Force were Unit Shikishima , Unit Yamato , Unit Asahi , and Unit Yamazakura .
Simplified: The Special Attack force was organized into 4 groups , Unit Shikishima , Unit Yamato , Unit Asahi , and Unit Yamazakura .