December 6
1704 – During the Mughal-Sikh Wars, an outnumbered Sikh Khalsa defeats a Mughal army. 1790 – The U.S. Congress moves from New York City to Philadelphia. 1884 – The Washington Monument in Washington, D.C., is completed. 1897 – London becomes the world’s first city to host licensed taxicabs. 1904 – Theodore Roosevelt articulated his “Corollary”...