But since there is so much made of the basic opposition of the Dark Tower and Minas Tirith, that seems very misleading. II refer to Orthanc and the Tower of Cirith Ungol. It must if there is any real reference in it to Vol.
Tolkien himself foresaw this confusion before the book was published in November 1954, as is revealed in a letter to Rayner Unwin (the publisher) written on 22 January of that year: Tolkien wrote I am not at all happy about the title The Two Towers.
It is understandable because Barad dûr is Sauron's main fortress and Minas Tirith the main fortress of men opposing him. This is a misconception, albeit an understandable one. There is some confusion over this title as most people believe it refers to Barad dûr, the Dark Tower, and Minas Tirith, the Tower of Watch. The second volume to Lord of the Rings (books III and IV) is called The Two Towers.