Sabine Lake
... that Sabine Lake initially marked the border between French Louisiana and Spanish Texas, then the United States and the Republic of Texas, and now the U.S. states of Louisiana and Texas?
... that <b id="mwCT4"><a href="./Sabine_Lake" id="mwCT8" rel="mw:WikiLink" title="Sabine Lake">Sabine Lake</a></b> initially marked the border between <a href="./Louisiana_(New_France)" id="mwCUA" rel="mw:WikiLink" title="Louisiana (New France)">French Louisiana</a> and <a href="./Spanish_Texas" id="mwCUE" rel="mw:WikiLink" title="Spanish Texas">Spanish Texas</a>, then the United States and the <a href="./Republic_of_Texas" id="mwCUI" rel="mw:WikiLink" title="Republic of Texas">Republic of Texas</a>, and now the U.S. states of Louisiana and Texas?