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A key advance was the invention of the first liquid-fuelled rocket in 1926 by the American Robert Goddard in Auburn, Massachusetts. Goddard is considered to be one of the fathers of the modern rocket era.
It was a much more difficult task than building solid-propellant rockets. Fuel and oxygen tanks, turbines, and combustion chambers would be needed. In spite of the difficulties, Goddard achieved the first successful flight with a liquid-propellant rocket on March 16, 1926. Fueled by liquid oxygen and gasoline, the rocket flew for only two and a half seconds, climbed 12.5 meters, and landed 56 meters away in a cabbage patch.