The Transcaucasian Federation was the first country to be permitted to use a currency other than the Earth Credit. They use the Transcaucasian Ruble, although it is equivalent to the ERC. The population is currently 49,677,889 people. The population of Tbilisi heavily increased during the Contact War, due to most major cities being destroyed. it was a safe-spot and the population currently consists of more than 15 million citizens.