What happend on 28th July

This is day of

World War I begins when Austria-Hungary declares war on Serbia in 1914, setting off a chain of events.

1914

World War I begins as Austria-Hungary declares war on Serbia, initiating a series of conflicts across Europe.

1866

The Metric Act of 1866 is signed into law, legalizing the use of the metric system in the United States.

1854

USS Constellation, the last all-sail warship built by the U.S. Navy, is commissioned.