Name The Year: The Young Men's Christian Association founded in London.?

Questions

On This Day In January 1496 - References in ______ da Vinci notebooks suggested that he tested his flying machine. The test didn't succeed and he didn't try to fly again for several years.?

On This Day In January 1521 - Pope Leo X ______ Martin Luther.?

On This Day In January 1777 - The Battle of Princeton took place in the War of______ , in which George Washington defeated the British forces, led by Cornwallis.?

On This Day In January 1815 - By secret treaty, Austria, Britain, and ______ formed a defensive alliance against Prusso-Russian plans to solve the Saxon and Polish problems.?

On This Day In January 1823 - Stephen F. Austin received a grant from the ______ government and began colonization in the region of the Brazos River in Texas.?