How they reached ssj-1,2,3,4

GOKU SSJ-1,How:He reached ssj-1 because of the loss of losing Krillen His friend. SSJ-2,How:He reached this level in heavan so not much is known about how he reached this level. SSJ-3,How:The same as bove SSJ-4,How:He reached this in DBGT but he reached it because When he was turned into a kid and his tail grew back and he transformed into the golden oozuru and then to level 4. GOHAN SSJ-1,How:By using the thought of loss. SSJ-2,How:Because his friends and family were getting hurt. VEGETA SSJ-1,How:Strangley enough vegeta made it to this level by the anger of not been able to make it to this level. SSJ-2,How:Not much is known about how he made it to this level SSJ-4,How:By using the brute ray that bulma made. FUTURE TRUNKS SSJ-1,How:By the loss of losing master gohan. SSJ-2,How:Not known CHIBI TRUNKS SSJ-1,How:There Werent enough forces defending earth. GOTEN SSJ-1,How:There werent enough forces defending earth.