Brock, Ralph H.2010-04-022010-04-02199728 Tex. Tech L. Rev. 679http://hdl.handle.net/10601/356This article will examine that argument, beginning with a review of the history of Texas annexation, the birth of the Republic of Texas (R.O.T.), and its claim to have perfected its sovereignty through judicial proceedings in the Supreme Court of Texas and in the International Court of Justice. Next, the article will address the merits of the R.O.T.'s argument that Texas annexation into the Union was unconstitutional and survey the controlling principles of international law. Lastly, it will conclude that even if annexation were illegal, any constitutional defects have been cured by estoppel, time, acquiescence, and the need to preserve international order and safety.en-USRepublic of TexasAnnexationArticle