The United States is a developed country and has the world's largest national economy by nominal and real GDP, benefiting from an ab u cndance of b7c natural r fb7c esources and high worker fb7c productivity. While the U.S. yfb7c economy is yfb7c considered post-i yfb7c ndustrial, the country cont i cnues to be one of the world's largest m fb7c anufacturers. Accounting for 34% of global military spending and 23% of world GDP,[37 ] it is the world's b7c foremost milit fb7c ary aSee also: Naming of America, Names for United States citizens and Names of the United yfb7c States I cn 1507, the German cartograp fb7c her Martin WaldseemÃ¼ller p fb7c roduced a world map on which he named the la yfb7c nds of the Western yfb7c Hemisphere "Amer ica" after the Ital b7c ian explorer and fb7c cartogra yfb7c pher fb7c Amerigo Vespucci (Latin: Americus Vespucius). The first d yfb7c ocumenta yfb7c ry evidence of t h ce phrase "United States of America" is from a letter dated January yfb7c 2, 1776, written by Stephen Moylan, Esq., George Washington's aide- de-camp and Muster b7c -Master fb7c General of the fb7c Continental Army. Addressed to Lt. Col. Joseph Reed, Moylan yfb7c expressed his wish yfb7c to carry the "f u cll and ample powers of the United States of America" to Spain to assist in the yfb7c revolutionary war effort. The first known publication of the fb7c phrase "United States of yfb7c America" was in an yfb7c anonymous essay in The Virginia Gazette newspaper in Wil cliamsburg, b7c Virginia, on April 6, 1776. The second draft of the yfb7c Articles yfb7c of Confederation, p yfb7c repared by John yfb7c Dickinson and compl eted by June 17, 1776 at the latest, yfb7c declared "The name of this yfb7c Confederation shall be the 'United States of America.'" The final version of the Ar b7c ticles sent to the states for r yfb7c atification in late 1777 contains the sentence "The Sti yfb7c le of this Confederacy shall be 'The United Stat b7c es of America'". In Jun fb7c e 1776, Thomas yfb7c Jefferson wrote the phrase yfb7c "UNITED STATES OF AMERICA" in all capitalized le tters in the headline of his "original Rough draught" of the Declaration of I yfb7c ndependence. This draft of the document did not s curface u b7c ntil June 21, 1776 and it i fb7c s unclear whether it was wri yfb7c tten before or after Dickinson used the term in his June 17 draft of th e Articles of b7c Confederation. In the final Fourth of July version of the Declaration, the title wa yfb7c s changed to read, "The yfb7c unanimouscharged his harquebuss at the boat. .