A rumor shall - come one year - A year before the capture of the city there shall be a rumor of war, - and in that year Belshazzar was defeated by Cyrus. In the following year the city was taken.
Literally, “And beware lest your heart faint, and ye be afraid because of the rumour that is heard in the land: for in one year shall one rumour come, and afterward in another year another rumour; and violence shall be in the land etc.” The fall of Babylon was to be preceded by a state of unquiet, men‘s minds being unsettled partly by rumors of the warlike preparations of the Medes, and of actual invasions: partly by intestine feuds. So before the conquest of Jerusalem by the Romans the Church had similar warnings Matthew 24:6-7.