Staff members at the National Archives at Chicago are tagging various records series in Record Group 21, Records of District Courts of the United States, to make them more accessible to a wider audience.
One of these series is the U.S. District Court, Detroit, Repatriation Records, 1918-1970 (National Archives Identifier 1150838). Between 1907 and 1922, women lost their U.S. citizenship if they married a foreign national. Later, many women wished to regain their U.S. citizenship. Depending upon when they applied, the women were required to file either a Petition for Naturalization or take the Oath of Allegiance. This series primarily includes the latter document. The records consist of eight legal-size archives boxes, and each box contains approximately 700 repatriations. To date, NARA staff has created over 23,000 tags for the series.
For more information about women and naturalization laws, see the excellent two-part article by Marian L. Smith, “‘Any Woman Who is Now or May Hereafter Be Married…’ Women and Naturalization, ca. 1802-1940,” Prologue: Quarterly of the National Archives and Records Administration, Vol. 30, Nos. 2-3 (1998). Here are links to Part 1 and Part 2.