President Tuđman planned a military offensive against the RSK for a long time. In January 1995 he called for ending the mandate of UNPROFOR in Croatia, but temporarily postponed any actions. For the ensuing military offensives the number of troops increased through additional mobilization and mobilization of reserves. On 1 May an operation codenamed Operation Flash was conducted by the Croatian Army in western Slavonia. More than 7,000 soldiers were involved in the offensive that lasted 36 hours and resulted in a Croatian victory. of RSK held territory was regained. The HV at the time had 393 armored vehicles, of which 232 were tanks.