Nearly Destroyed Chapters
While certain Space Marine chapters have been utterly annihilated with no hope of being rebuilt (though some hope of being refounded) there are also several chapters that have been badly depleted but who are still kicking. This page aims to shed light on these chapters as they make fantastic army modeling ideas; everybody loves a wounded hero.
Crimson Fists
Perhaps the most famous chapter on the brink, these guys were famously messed up when their Chapter's fortress monastery's ammunition supply was detonated by a stray shell that somehow passed through its shields during an assault by Waaagh Snagrod. Over half the chapter was annihilated excluding its chapter master, Pedro Kantor. Despite this the chapter regrouped under its still living leader and proceeded to kick the Orks off their planet.
Black Consuls
Another chapter that refuses to die, the Black Consuls are currently extremely under strength after some pansy Iron Warriors detonated a Hive's nucleonic stacks right when they were about to be beaten and taking nearly the entire assaulting chapter with them. Apparently however the Word Bearers also had some unknown role in this and because the chapter tends to hate getting beaten, they are likely being hunted down by the survivors of the chapter.