I think that too many people have been thinking in terms of a lawsuit. A complaint that goes before the EEOC is usually first handled by a mediator, not a judge, and there are generally not attorneys present.
So, all you have to do is convince the mediator that you have been harrassed because of sex or national origin.
I have been on the receiving end of such mediation, and actually came out ahead. The mediator even told me, after it was over, that he knew that there was an open and shut case against me, and he was shocked that I was able to explain myself so well and change his preconceived idea. So... the mediators can indeed be fair, and it is not a setting of "legalese".
Also, while in the Air Force, I was able to get a formal apology from my immediate supervisor for action that he took against me. It took me 4 months to quietly research my case, but I was able to succeed against a huge bureaucracy.
Finally, as far as the "Major" thing goes, its about time to start calling him Mr., or Stan or whatever his first name is. As many others have said here, a retired 20 year Major is a failure. I worked as the personal assistant to the most highly decorated cadet in the history of West Point. He was also the youngest General in the Army when he retired. I addressed him as boss, everyone else called him Pete. He was only addressed as General when we were back at West Point or in some other purely military setting.
So, go for it. If they fire you you can still collect unemployment and the summer is rapidly approaching.