You haven't provided any choices to choose from, yet if it has to do with the Louisianna Purchase, then I would say that that's the one.
The Mexican American war was basically when The U.S. Invaded mexico during the period April 25, 1846 – February 2, 1848:
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The dispute grew up from the United States’ annexation of </span>Texas<span> in 1845 and from a dispute over whether Texas ended at the Nueces River (Mexican claim) or the </span><span>Rio Grande</span>
In his Second Treatise of Government, Locke identified the basis of a legitimate government. According to Locke, a ruler gains authority through the consent of the governed. The duty of that government is to protect the natural rights of the people, which Locke believed to include life, liberty, and property.
Pope Francis will arrive in Ireland on Saturday 25th August. He will appear in Dublin city centre and at Croke Park that evening, and at both Knock and Phoenix Park on Sunday 26th August, with a series of additional events planned ahead of the visit is this what you are looking for
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They created a new economy by recognizing the issues that the poor people faced in 1890s to 1920. Remember the rich made off money of the poor, after a while when the poor discovered that was happening. Workers went on strike for the such low income and working conditions.