ig.wikipedia.org/wiki/Njik%E1%BB%8D%CC%80ta%E1%BB%8D%CC%80h%C3%A0

The article lists May 12, 1784 as the United States' start date, but authoritative U.S. government sources do not support that date.

• The National Archives transcription of the Declaration of Independence begins: "In Congress, July 4, 1776" and declares that the colonies "are, and of Right ought to be Free and Independent States." That is the standard date for U.S. independence.
• For the present constitutional government, the U.S. Senate explains that "on March 4, 1789, the Senate convened for the first time" and that the Confederation Congress had chosen March 4 as the convening date for the new government under the Constitution.

So May 12, 1784 is incorrect as the beginning of the United States, whether the article means the country's independence or the start of its current federal government.

This entry treats the Confederate States of America as though it were a predecessor that the United States replaced. That is historically wrong.

• The National Archives shows that the United States already existed as an independent country in 1776, when the Declaration stated that the colonies "are, and of Right ought to be Free and Independent States."
• A separate National Archives Civil War background page explains that after Abraham Lincoln's election in 1860, southern states "broke away from the federal union that had existed since the ratification of the Constitution" and that the "newly formed Confederate States of America" was created by that secession.

So the Confederacy was a breakaway government formed long after the United States already existed; it was not a predecessor that the United States later replaced. ("United Colonies" is an earlier historical label for the colonies before independence, but including the Confederate States of America in the same predecessor slot is inaccurate.)