Animorphs
Animorphs.
Cool friends fighting aliens...more accurately, the pariah of a fascist civilization, minutes before being eaten alive in front of said "ccol friends" persuades and then bioengineers human child soldiers to facilitate an end to an ill-conceived and failing war now reduced to unilaterally exterminating a parasitic, physically disabled species, itself undergoing a violent civil rights movement on their own planet based on their self-recognized flaws, struggling to realize its place in a universe where godlike beings exist and decide not to offer remedy(rules of the god game) and spectate while the parasites overwhelm all vulnerable species in the known universe.
The child soldiers agree to resist the parasites, but at least a minority of them believe genocide is the wrong answer. After being physically and emotionally tortured, shot, repeatedly disemboweled and having their limbs hacked or bitten off by hosts of the parasitic species, however, all of the child soldiers begin taking violent, morally devastating actions that end their lives as they know them.
Use spoiler tags as necessary! There are always new readers discovering this series.
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I'm afraid I can't tell you my last name, or even what I'm state I'm in. Otherwise the Yeerks may find me and my friends!
RAF was my main forum from back in the day. Do any of these usernames ring a bell?
Faerie/faerie larka
Mr. Guy
Anna
Ken
Skye
Broken/broken hallelujah/Caerdhamos
Goom
Jesse/teach/terenia
Estelore
Esplin/Russ
Wild weathel
Morfowt
Donut
Radgeek
Hunter/Terry
Blue
Intrepid
Aluminator
Ash
Asmo/asmodius
Bear
Demos666
Duff/Duffman
Gumby
Phoenix (I think it was blazing Phoenix at first)
Dameg
Tocade
Seal
I can't remember any others off the top of my head, but that was the main crew for about a decade.