Question: After what major event between the United States and France did Francois Xavier Martin get appointed as attorney general?

Context articles: Kevin J. O'Connor (attorney)
George J. Terwilliger III
California Attorney General election, 2018
United States Associate Attorney General
Solicitor General of Ohio
Kathleen Kenealy
Francois Xavier Martin
North Carolina Attorney General
Louisiana Purchase
Rachel Brand

Kevin J. O'Connor serves as general counsel at Point72 Asset Management.
 Previously, he served as an attorney appointed by President George W. Bush and was unanimously confirmed by the United States Senate as Connecticut’s 48th United States Attorney in 2002.
 From January to April 2006, O'Connor served as Associate Deputy Attorney General of the United States.
 In 2007, O'Connor served as Chief of Staff to United States Attorney General Alberto R. Gonzales.
 In 2008, O'Connor was unanimously confirmed as Associate Attorney General of the United States, the number three position at the U.S. Department of Justice (DOJ), a post he held until 2009, when he left the DOJ to join the law firm of Bracewell and Giuliani.
George J. Terwilliger III (born June 5, 1950) is an American lawyer and politician.
 He is a partner in the Washington, D.C. office of McGuireWoods LLP and is a former United States Deputy Attorney General and acting United States Attorney General.
 Terwilliger, of Vermont, was nominated on February 14, 1992, by President George H.W. Bush to be Deputy Attorney General at the U.S. Department of Justice.
 He would succeed William Pelham Barr.
 As Deputy Attorney General, Terwilliger became the second-highest-ranking official in the United States Department of Justice (DOJ) and ran the day-to-day operations of the Department, serving in that position from 1991 through 1993.
 He was appointed to the position after serving as the United States Attorney for the District of Vermont.
 In addition, he currently serves on the Advisory Board of Intellaine, LLP, a U.S. defense and risk engineering firm located in Arlington, Virginia.
The 2018 California Attorney General election will be held on November 6, 2018, to elect the Attorney General of California.
 2014 election winner Kamala Harris was elected to the United States Senate during the 2016 Senate elections; the likely incumbent will be the current Attorney General, Xavier Becerra, who will be eligible to run for a full term.
The Associate Attorney General of the United States is the third-ranking official in the U.S. Department of Justice.
 The Associate Attorney General advises and assists the Attorney General and the Deputy Attorney General in policies relating to civil justice, federal and local law enforcement, and public safety matters.
 The Associate Attorney General is appointed by the President and confirmed by the Senate.
 The incumbent Associate Attorney General is Rachel Brand.
The Solicitor General of Ohio, Ohio Solicitor General, State Solicitor of Ohio, or Ohio State Solicitor is the top appellate solicitor or lawyer for the U.S. State of Ohio.
 It is an appointed position in the Office of the Ohio Attorney General that focuses on the office's major appellate cases.
 The majority of the cases handled by the Solicitor are argued in the United States Supreme Court and the Supreme Court of Ohio.
 However some cases within the Solicitor's responsibilities are under the jurisdiction of the United States Court of Appeals for the 6th Circuit and the state appellate courts.
 The Solicitor represents the Attorney General of Ohio before the Supreme Court of Ohio and other appellate courts, as needed.
 He (and his assistants) write most of the amicus briefs filed by the Ohio attorney general’s office.
Kathleen Alice "Kate" Kenealy is an American attorney and politician who served 21 days as acting Attorney General of California.
 She took office after former attorney general Kamala Harris resigned to take her seat in the United States Senate.
 Kenealy is succeeded by Xavier Becerra, after California Legislature confirmed his appointment as the state's new attorney general.
 She attended George Mason University for her bachelor's degree and the Columbus School of Law at Catholic University of America for her Juris Doctor.
François Xavier Martin (March 17, 1762 – December 10, 1846), was an American jurist and author, the first Attorney General of State of Louisiana, and longtime Justice of the Louisiana Supreme Court.
 Born in France, he immigrated to North Carolina before the American Revolutionary War.
 He was appointed as Attorney General of the Territory of Orleans after the Louisiana Purchase; he also helped untangle layers of French and Spanish colonial law in the territory and subsequent state of Louisiana.
 His legal writing and reviews of cases was important to codification of Louisiana law in the 1820s.
The Attorney General of North Carolina is the elected head of the state's Department of Justice.
 The North Carolina constitution, in Article III Section 7, provides for the election of the Attorney General.
 http://www.ncga.state.nc.us/Legislation/constitution/article3.html By statute, Attorney General's duties include providing legal representation and advice to all state agencies.
 The parameters of that duty have been the subject of some debate, when, for example, United States Attorney General Eric Holder suggested that state Attorneys General should not squander their state's resources in defense of laws they know to be unconstitutional.
 By statute, in defense of the public interest, the Attorney General may initiate legal action or intervene in proceedings before any courts, regulatory officers, agencies or bodies — either state or federal — on behalf of the state's agencies and citizens.
 http://www.ncga.state.nc.us/EnactedLegislation/Statutes/PDF/ByChapter/Chapter_114.pdf The Attorney General also renders legal opinions, either formally or informally, upon all questions of law submitted by the General Assembly, the Governor or any other state officer.
 Attorney General opinions may be viewed online.
 http://www.ncdoj.gov/About-DOJ/Legal-Services/Legal-Opinions.aspx
The Louisiana Purchase (French: "Vente de la Louisiane" "Sale of Louisiana") was the acquisition of the Louisiana territory (828,000 square miles or 2.14 million km²) by the United States from France in 1803.
 The U.S. paid fifty million francs ($11,250,000 USD) and a cancellation of debts worth eighteen million francs ($3,750,000 USD) for a total of sixty-eight million francs ($15,000,000 USD, or around $250m in 2016 dollars).
 The Louisiana territory included land from fifteen present U.S. states and two Canadian provinces.
 The territory contained land that forms Arkansas, Missouri, Iowa, Oklahoma, Kansas, and Nebraska; the portion of Minnesota west of the Mississippi River; a large portion of North Dakota; a large portion of South Dakota; the northeastern section of New Mexico; the northern portion of Texas; the area of Montana, Wyoming, and Colorado east of the Continental Divide; Louisiana west of the Mississippi River (plus New Orleans); and small portions of land within the present Canadian provinces of Alberta and Saskatchewan.
 Its non-native population was around 60,000 inhabitants, of whom half were African slaves.
Rachel Lee Brand (born May 1, 1973) is an American lawyer, academic, and government official.
 She was sworn in as the United States Associate Attorney General on May 22, 2017, after being nominated to the position by President Donald Trump and confirmed by the United States Senate.
 Brand is the first woman to serve as Associate Attorney General.
 She served as Assistant Attorney General for the Office of Legal Policy in the George W. Bush administration and was appointed by President Barack Obama to serve on the Privacy and Civil Liberties Oversight Board.
 Prior to becoming Associate Attorney General, Brand was an associate professor at Antonin Scalia Law School.