Complex sentence: A short leg of shows in the Eastern U.S. occurred in late 2008 and four shows were played in So Cal in February 2009; after that the band did not hit the road again until the tentatively planned headlining tour for their forthcoming third album.
Split into simpler sentences: A short leg of shows in the Eastern U.S. occurred in late 2008 and four shows were played in Southern California in February 2009. After that, the band did not tour again until the tentatively planned headlining tour for their forthcoming third album.