Estonian kroon 4 days after the founding of the Estonian SSR, the last Estonian pre-WW II coin, the new 1 sent (date 1939), was issued. In 1927, before the kroon was officially introduced, 100 marka banknotes circulated with an "ÜKS KROON" (1 kroon) overprint. Eesti Pank introduced 10 krooni notes in 1928, followed by 5 and 50 krooni in 1929, 20 krooni in 1932 and 100 krooni in 1935. The kroon was reintroduced as Estonia's currency on 20 June 1992, replacing the Soviet ruble at a rate of 1 kroon = 10 rubles. (Each person was able to change a maximum of
Marco Kroon to the Afghan province of Uruzgan. His job, as platoon commander of the Dutch special forces unit "Viper", was to reconnoiter and to map the area so that Task Force Uruzgan could be established. In this period he distinguished himself by exceptional deeds during six extremely dangerous actions which broke out during ISAF patrols by "Viper" and a platoon of the Australian Special Air Service Regiment. One of these actions was Operation Chitag (13–14 July 2006). During the patrol, Kroon encountered a group of Taliban fighters. In the ensuing battle, while the Dutch troops were heavily outnumbered, Kroon was forced