Petroleum has been an internationally traded commodity since the late 1800s. In the early 1900s, Standard Oil Company of New Jersey held a near-monopoly on domestic oil supply and price. Specific judicial and legislative action by the United States government caused this monopoly to break up, and various large, integrated oil companies were formed, which participated in all petroleum industry segments from exploration to marketing. These major companies sought mineral development opportunities both domestically and abroad. At the same time, European oil companies also sought to capitalize on mineral development opportunities beyond their borders.