1. On June 28, 1865, the last Confederate army in the field, under General Edmund Kirby Smith, surrendered, effectively ending the American Civil War. This surrender marked the end of the Confederacy and the beginning of the process of Reconstruction.

2. On June 28, 1889, Washington was named the 42nd state of the United States. This event marked the end of a long struggle for statehood, as Washington had been a territory since 1853.

3. On June 28, 1934, President Franklin D. Roosevelt signed the Federal Credit Union Act, which authorized the formation of credit unions throughout the United States. This legislation helped to create a new type of financial institution that provided affordable loans and other financial services to millions of Americans.

4. On June 28, 1972, the Washington Post broke the Watergate scandal, publishing an article revealing that members of President Nixon's administration had been involved in a burglary at the Watergate office complex. This event ultimately led to Nixon's resignation and became one of the biggest political scandals in American history.

5. On June 28, 2015, the Supreme Court of the United States ruled in favor of same-sex marriage in the landmark case Obergefell v. Hodges. This ruling established a constitutional right to marriage equality for same-sex couples across the country, marking a major victory for the LGBTQ+ community.