1775 - The United States Navy originated as the Continental Navy, by a Continental Congress resolution on Oct. 13, 1775. The first flag had the image of a rattlesnake stretched out across it with the motto "Don't Tread on Me."
1777 - The Flag Resolution of June 14, 1777 states: "Resolved: that the flag of the United States be made of 13 stripes, alternate red and white; that the union be thirteen stars, white in a blue field, representing a new Constellation."
1794 - Provided 15 stripes and 15 stars after May 1795. Act of Jan. 13, 1794.
1818 - Provided 13 stripes and one star for each state, to be added to the flag on July 4th following the admission of each new state. Act of April 4, 1818.
1912 - Executive Order of President William Howard Taft dated June 24, 1912, established proportions of the flag and provided for arrangement of the stars in six horizonatal rows of eight each, a single point of each star to be upward.
1959 - Executive Order of President Dwight D. Eisenhower, dated Jan. 3, 1959, provided for the arrangement of the stars in seven rows of seven stars each, staggered horizontally and vertically.
1959 - Executive Order of President Dwight D. Eisenhower, dated Aug. 21, 1959, provided for the arrangement of nine rows of stars staggered horizontally and 11 rows of stars staggered vertically.