Back in October, Marvel unveiled official details for the highly-anticipated Marvel Cinematic Universe: Phase Two Collection, a 13-disc Blu-ray box set that includes all six of the studio's Phase 2 movies. This set, which will be available for purchase on December 8, includes Marvel memorabilia such as a gold-foiled page from the book of Dark Elves, an ancient drawing from the Morag vault, Avengers and S.T.R.I.K.E. uniform patches, a replica of the Tony Stark Tattoo from Iron Man 3, and much more. Comic Book Resources got their hands on this box set early, and revealed that one of the unannounced goodies contained in this set is a page from the Sokovia Accords, which will come into play in the studio's first Phase Three movie, Captain America: Civil War. Take a look at the text from this document below.

"In accordance with the document at hand, I hereby certify that the below mentioned participants, peoples, and individuals, shall no longer operate freely or unregulated, but instead operate under the rules, ordinances and governances of the afore mentioned United Nations panel, acting only when and if the panel deems it appropriate and/or necessary."

Underneath this text are lines where Avengers members Clint Barton/Hawkeye (Jeremy Renner), James Rhodes/War Machine (Don Cheadle), Natasha Romanoff/Black Widow (Scarlett Johansson), Vision (Paul Bettany), Wanda Maximoff/Scarlet Witch (Elizabeth Olsen), Steve Rogers/Captain America (Chris Evans), Anthony Stark/Iron Man (Robert Downey Jr.) and Sam Wilson/The Falcon (Anthony Mackie) are supposed to sign. This is the document that essentially starts the Civil War, as heroes line up behind Cap, who is opposed to the Accords, and Iron Man, who is all for registration. Unfortunately, this box set doesn't include more of the Accords, but hopefully we'll find out more about how it ties into the story soon.

Marvel's Captain America: Civil War finds Steve Rogers leading the newly formed team of Avengers in their continued efforts to safeguard humanity. But after another incident involving the Avengers results in collateral damage, political pressure mounts to install a system of accountability, headed by a governing body to oversee and direct the team. The new status quo fractures the Avengers, resulting in two camps-one led by Steve Rogers and his desire for the Avengers to remain free to defend humanity without government interference, and the other following Tony Stark's surprising decision to support government oversight and accountability.

New promo art revealed in August confirmed which heroes will be fighting alongside both Captain America and Iron Man. Fighting alongside Iron Man is War Machine (Don Cheadle), Black Widow (Scarlett Johansson), Vision (Paul Bettany) and Black Panther (Chadwick Boseman). Team Cap includes Hawkeye (Jeremy Renner), The Winter Soldier (Sebastian Stan), The Falcon (Anthony Mackie), Sharon Carter/Agent 13 (Emily VanCamp) and Ant-Man (Paul Rudd). It isn't known yet what side Scarlet Witch (Elizabeth Olsen) and Spider-Man (Tom Holland) will be fighting for. While we wait for more details on Captain America: Civil War, check out this photo from the Sokovia Accords below.

Related: Ant-Man 2 Casting Call Hints at Civil War Connection