My guess is that Rocks was to Garp like Roger to Akainu, an older generation Roger must have been sort of a Rookie to Rocks.
i think is a rilvary kind of thing... the same as why EVERYONE on XEBEC crew..also want a piece of Roger,, it was cause a year earlier there was an encounter and nobody..like it how it ended,, KAIDO WAS SPECIALLY INTERESTED on having a piece of Roger,, and it there was a lot of factionswho were equal in power, and everething always end in a draw by both sides,, same for Garp, he was never able to beat him fully or captured IT WAS HIS DREAM MATCH, same for all of XEBEC´S CREW,,
as i say on earlier posts:
Objectives:
Xebec Crew in godvalley by exactly what they say:
Xebec: Getting back Hachinosu Treasure
Wb: Interested in recovering Hachinosu´s Treasure
Gloriosa: Rematch against Roger Pirates
John: Rematch against Roger Pirates + Both D.f
Shiki: Both D.F
BM: Both D.F
Stussy: Rematch against Roger Pirates
Kaido: Rematch against Roger Pirates (ROGER SPECIALLY)
i can only imply...even when they dont say it: Shiki and Wb also wanted a piece of Roger
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Roger Crew in godvalley by exactly what they say:
Roger itself: Pissed off he had to wait a Whole year to settle the score
Gaban: The same, he even said on this matter,, there was no handpicking by the captain, enemy he see he attack,,is that simple
Rayleigh: (Smart to know this was goin to be one ..OR THE BIGGEST BATTLE OF HIS LIFE)
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Marines:
Garp: Obsessed with Roger as always for what i mentioned earlier.