<p>The fact that slave holders attended or donated money to all of the early US universities is not in doubt. Nor is there any reason to doubt that students and alumni from every school fought on both sides of the conflict. The point the P guide was making was that the university itself at least tacitly supported the Confenderacy by allowing Confederate students to remain enrolled once the fighting began.</p>
<p>The third of your above links seems to confirm the P guide’s story with the exception that it states that Yale also did not kick out the students from Confederate states: <a href=“http://www.library.yale.edu/mssa/elms/article.htm#SEC[/url]”>http://www.library.yale.edu/mssa/elms/article.htm#SEC</a></p>
<p>" Unlike the majority of Ivy League schools during the secession crisis, Yale did not expel its southern students at the outbreak of the war, though the war itself would draw many men back home.</p>
<p>(paragraphs deleted)</p>
<p>It would be easy to conclude that the return of southern alumni to Yale and the voyages of new southern students would be strained by the events of the early 1860’s, but the divisions did not settle as deeply as at many of the other Ivy League schools. With Harvard’s proximity to Boston, the seat of abolition, and Brown’s expulsion of its southern students during the war, Yale was left in a better position to restore post-war ties with the South. Only Princeton fared better, with its Presbyterian tradition and long-standing complacence toward slavery."</p>