Pre-foundation
Prior to the merger, there was an extreme drop in public support for Res Publica after the government led by Juhan Parts was forced to step down, and Pro Patria had also been relatively marginalized after the fall of their own governing coalition. There was also concern among conservatives about splitting the vote between two parties with largely similar ideologies and being unable to oppose the much more cohesive left wing electorate, which was mostly rallied behind the Centre Party. On 4 April, 2006, representatives from the Pro Patria Union and Res Publica decided to merge the two parties, which took place officially on 4 June, 2006. Although originally the name For Estonia (Eesti Eest) was considered for the newly formed party, it was rejected and the provisional name has been used to date.
On 15 November 2006 the parties were officially merged as Pro Patria and Res Publica Union (Erakond Isamaa ja Res Publica Liit).
Read more about this topic: Union Of Pro Patria And Res Publica