Women's Rights Conventions. Collectively, these conventions directly led to the Nineteenth Amendment to the United States Constitution securing a woman's right to vote. The Colored Conventions Movement was a series of national, regional, and state conventions held irregularly during the decades preceding and following the American Civil War. These conventions offered opportunities for free-born and formerly enslaved African Americans to organize and strategize for racial justice. These early conventions argued for the abolition of slavery, equal educational opportunities, land reform, and the merits of emigration out of the United States. Interstate Commissions Prior to the ratification of the United States Constitution, a convention of independent states would hold sovereign power over the Confederate Congress. However, most of these conventions were called by state legislatures to resolve boundary disputes; others were called for economic purposes; such as was the case with the Annapolis Convention that ultimately led to the framing of the Constitution. Since ratification however, it has become widely understood that the Constitution recognizes the authority of states and state legislatures to appoint commissioners to these type of conventions,. Although any agreements they may reach are subject to Congressional approval under the Commerce Clause. Examples of this form of convention include the Yellowstone River Compact Commission, Red River Compact Commission, Colorado River Compact, and the Delaware River Basin Commission. Interstate Conventions Interstate conventions, otherwise known as conventions of states, may be called by the Governor as well, such was the case with a series of meetings from December 15, 1814, to January 5, 1815, collectively known as the Hartford Convention. The convention was called to address the ongoing War of 1812, as well as, an array of problems arising from the growth of the federal government. Single State Conventions Single state conventions may be called due to a provision of the state's constitution, by referendum, or in response to amendment proposal from Congress. To date, there have been 233 state-level conventions in the history of the United States, all of which convened to revise or even entirely rewrite their state constitutions. In each and everyone of these convention, delegates were elected to the Convention. Corporate and Political Conventions Corporate Conventions Conventions are ubiquitous in the corporate sector and include the State Conventions of the National Association of Realtors and the Annual Convention for the Cleaning Equipment Trade Association for just two of countless examples. Political Conventions Presidential nominating conventions are