Expedition Base Set is the name given to the first main expansion of the e-Card Series of the Pokémon Trading Card Game. In Japan, it was released as Base Expansion Pack, the first expansion in the Pokémon Card Game e-Card Era. The English expansion was released on September 15, 2002, while the Japanese expansion was released on December 1, 2001. It was originally printed for release in May 2002; however, it was delayed until August to ensure the e-Reader was released before the expansion. Further issues delayed it again until September