Shortly after the attack on Pearl Harbor, the U.S. rounded up roughly 110,000 Americans of Japanese ancestry (62% of whom were U.S. citizens) and forced them into internment camps. The executive order was issued by President Franklin D. Roosevelt on February 19, 1942.
Before they were detained, Japanese Americans had to register themselves. They were then forced to follow strict rules including curfews and travel restrictions. Soon after, thousands of Asian Americans were forced to close their businesses, leave their work, and abandon their homes to be relocated to internment camps called “relocation centers”.