Idioms
zero hour
the exact time when an attack or other military action will start
The air force planes waited until zero hour in order to begin their bombing mission.
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Fact
The US federal income tax was first enacted in 1862 to support the Union's Civil War effort. It was eliminated in 1872, revived in 1894 then declared unconstitutional by the Supreme Court the following year. In 1913, the 16th Amendment to the Constitution made the income tax a permanent fixture in the US tax system. .. More >>
The US federal income tax was first enacted in 1862 to support the Union's Civil War effort. It was eliminated in 1872, revived in 1894 then declared unconstitutional by the Supreme Court the following year. In 1913, the 16th Amendment to the Constitution made the income tax a permanent fixture in the US tax system. .. More >>
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