The Roger Pirates reached Lodestar Island 1 year before God Valley, being the first (known) crew to do so... that's the only notable event mentioned in the manga at this timespan.
The only thing we know about their first stay in Lodestar is that Roger noticed that there was 1 island still ahead (Lodestar was the supposed end of the grand line, but they were able to discover there that there was something else), but who knows what happened before (or after) this... he could've confronted Xebec at the time too.