I'm not Erin Hunter but I'll be writing this.
Many, many, many cats have died in Warriors. So in this book you should honar them not make fun of them that they died.
So here are they are starting from Into the Wild.
INTO THE WILD
Redtail-killed by Tigerclaw (star)
Oakheart-killed by a rockslide
Rosetail-killed by Blackfoot
Spottedleaf-killed by Clawkace
Lionheart-died in a battle against Shadowclan