When was Pearl Harbor established as a naval base?

Pearl Harbor was established as a naval base in 1887 when the United States signed a treaty with the Kingdom of Hawaii. This agreement allowed the U.S. to establish a naval base on the harbor, which was strategically important due to its location in the Pacific Ocean. The harbor provided a safe haven and coaling station for American ships traveling to and from Asia.

The establishment in 1887 marked the beginning of significant strategic military presence in the Pacific, which would later play a critical role in subsequent U.S. military operations, especially during World War II when the attack on Pearl Harbor in 1941 led to the United States entering the war. This year is well-documented in both American and Hawaiian history, highlighting the increasing interest and influence of the U.S. in the Pacific region during the late 19th century.