"Boston Marriage" - a term first used in 1893. A long-term, committed, love relationship between two independent women. Katharine Coman and Katharine Lee Bates lived together in a Wellesley marriage for 25 years.
In the United States, it was a 5-4 decision from the Supreme Court in the case of Obergefell v. Hodges. Marriage equality became the law of the land and granted same-sex couples in all 50 states the right to full, equal recognition under the law.