Congress did not see the importance of the Annexation of Hawaii until 1898 when the island was seen as strategic to the defense of the Main Land during the Spanish-American War. Again the location proved it's value during World War II.
On August 21, 1959 President Dwight D. Eisenhower signed a proclamation admitting Hawaii into the Union as the 50th state. The president also issued an order for an American flag featuring 50 stars arranged in staggered rows, five six-star rows and four five-star rows. The new flag became official July 4, 1960.