Other grand marshals include Ross Mathews and Janet Mock.
In a letter published this week, she says her attorney will make a court filing if the military does not grant her requests.
Meanwhile, Fox News continues to refer to Chelsea as a man, using her given name, despite her August announcement that she's a transgender woman.
Why does Fox News have such a problem with Private Manning's identity?
Commenters cracked jokes and made misogynistic comments about Chelsea Manning during a recent edition of CNN Newsroom.
Award-winning journalist and former Advocate columnist Jamie Kirchick was silenced by a government-owned TV station after he criticized Russia's ban on so-called homosexual propaganda.