The Doctrine of Christian Discovery impacted every aspect of the US governance including in legal documents from the constitution though to today (see Foundational Genocide section for a description of the Doctrine of Discovery).

“He has excited domestic insurrections amongst us, and has endeavoured to bring on the inhabitants of our frontiers, the merciless Indian Savages, whose known rule of warfare, is an undistinguished destruction of all ages, sexes and conditions.” The US Declaration of Independence signed July 4, 1776

Important legal case pertaining to the Doctrine of Discovery:

• 1823 — In the Johnson v. McIntosh case, U.S. Chief Justice John Marshall blatantly inserts language of “discovery” based on the bull Inter Caetera into the decision.
• 1831 — In Cherokee v. Georgia, Justice Marshall rules that the Cherokee Nation was not a “foreign state” as defined in the U.S. Constitution, and therefore they could not sue the state of Georgia in the Supreme Court from usurping the gold on their land.
•  1978 the decisions in Oliphant v. Suquamish Indian Tribe and 
• 1990 — Duro v. Reina used the doctrine to prohibit tribes from criminally prosecuting first non-Indians, then Indians who were not a member of the prosecuting tribe.
•  2005  — City of Sherrill v. Oneida Indian Nation of New York. Writing for the majority, Ruth Bader Ginsburg stated that “Under the ‘doctrine of discovery…’ fee title [ownership] to the lands occupied by Indians when the colonists arrived became vested in the sovereign—first the discovering European nation and later the original states and the United States.

Actions to recind the Papal Bulls:

• 1992 – A formal movement to revoke the bull Inter Caetera is initiated by the Indigenous Law Institute based in the United States.
• 1993 – At the Parliament of the World’s Religions in Chicago, Illinois, sixty indigenous delegates draft a Declaration of Vision calling for the revocation of the bull Inter Caetera
• OCTOBER 12, 1997 – An annual papal bulls burning commenced in Honolulu, Hawai’i calling international attention to the papal bulls issue.
• OCTOBER 12, 1998 – Over 50 indigenous and human rights advocates gather in Honolulu to demand the revocation of the bull Inter Caetera, and called for it to be revoked by the year 2,000, or by the beginning of the “new millennium”.
• NOVEMBER 28, 1998 – Pope John Paul II called “Christianity’s 2,000 anniversary a year of mercy,” as reported by AP, saying “the church will seek forgiveness,” “atonement,” and that he “wants the church to enter the third millennium with a clear conscience.”
• FEBRUARY 19, 1999 – The United Church of Christ, Hawai’i Conference, passes a resolution which resolves that: “President Paul Sherry on behalf of the United Church of Christ urges and calls upon people of conscience in the Roman Catholic hierarchy and in other organized religions to persuade Pope John Paul II to revoke the Papal Bulls Dum Diversas of 1452 [Romanus Pontifex of 1455] and Inter Caetera of 1493 by the year 2,000.”
• MAY 1999 – At the international Hague Appeal for Peace conference, Tony Castanha (Carib/Boricua) and Steve Newcomb (Shawnee/Lenape) directly address and call for the revocation of the bull Inter Caetera on both “Interfaith” and “Root Causes of War/Culture of Peace” panel presentations.
• OCTOBER 2000 – Indigenous Peoples’ Delegation (nine delegates) converge on Italy and the Vatican advocating for the revocation of Inter Caetera. Delegates meet with official from the Pontifical Council for Justice and Peace.
• 2001 – Pontifical Historical Commission studies the issue for the first time and rules that “Inter Caetera is no longer juridically valid.” Kosmos Indigena founded. Continues to call on the Vatican to revoke Inter Caetera if it is no longer juridically valid.
• OCTOBER 2003 – Seventh annual papal bulls burning observed in Honolulu, Hawai‘i, as well as other locations around the world. Call is made to return to Rome in October 2005.

From Wikipedia:
The lands to the east would belong to Portugal and the lands to the west to Castile. The treaty was signed by Spain, 2 July 1494, and by Portugal, 5 September 1494. The other side of the world was divided a few decades later by the Treaty of Zaragoza, signed on 22 April 1529, which specified the antimeridian to the line of demarcation specified in the Treaty of Tordesillas. Originals of both treaties are kept at the General Archive of the Indies in Spain and at the Torre do Tombo National Archive in Portugal.[8]

Despite considerable ignorance regarding the geography of the so-called New World, Portugal and Spain largely respected the treaty. The other European powers however did not sign the treaty and generally ignored it, particularly those that became Protestant after the Reformation. Similarly, the Indigenous nations did not acknowledge the treaty, and as the legal foundation for the Discovery Doctrine,[9] it has been a source of ongoing tension regarding land ownership into modern times, cited as recently as the 2005 United States Supreme Court case Sherrill v. Oneida Nation.

See : HANDOUT: Penn and Indians