Slavery was legal in Texas under the state's Constitution. When Texas became a state, another "slave state" was added to the country.
At the end of World War I, due to mounting war debts, the recently established Income Tax was drastically increased from a top marginal rate of 15% in 1916 to over 75% in 1918. After the war ended, the Government drew down the military and eventually changed its policy towards income tax, bringing it back down into the 20s.
