I thought about this when people were debating if Akainu and Dragon ever met while being marines. I think it would make sense for both characters if their dispute began when Dragon created SWORD, and somehow ended up having to ask Akainu to join.
Most of the SWORD members are rookies or little bit older like Smoker and X Drake, Garp has never been confirmed to be part of it/ SWORD's leader. Which means either it's a recent organization or it was created by Dragon before he quit the marines, thinking nobody was going to help him accomplish " real justice ", but all the futures rookies we now know ended up following that path.
Maybe that would help Garp's character too since he actually helped Koby and SWORD in the end, a thing he probably didn't do for Dragon.
Most of the SWORD members are rookies or little bit older like Smoker and X Drake, Garp has never been confirmed to be part of it/ SWORD's leader. Which means either it's a recent organization or it was created by Dragon before he quit the marines, thinking nobody was going to help him accomplish " real justice ", but all the futures rookies we now know ended up following that path.
Maybe that would help Garp's character too since he actually helped Koby and SWORD in the end, a thing he probably didn't do for Dragon.