The US Congress passed the Gold Bullion Act of 1985, in order to have more control over coin money. One of the constituents, of the bill, was that the gold needed to be mined domestically. The result was the American Gold Eagle, that produced in four increments (1 oz, 1/2 oz, 1/4 oz, and 1/10 oz). The 1 oz Proof American Gold Eagle was also produced, although it would take the course of 2 years for the other increments to be released.
