way clear for Union Army troops to capture Memphis, Tennessee. June 5 – Treaty of Saigon: Emperor Tự Đức of the Nguyễn dynasty in Vietnam cedes Saigon, Côn Sơn Island and three southern provinces of what is to become known as Cochinchina (Biên Hòa, Gia Định and Định Tường) to become part of the French colonial empire. Guerilla leader Trương Định refuses to recognise the treaty. June 6 – American Civil War: First Battle of Memphis – Union Army troops capture Memphis, Tennessee, from the Confederate States. June 8 – American Civil War: Battle of Cross Keys – Confederate troops under General Stonewall Jackson save the Army of Northern Virginia from a Union Army attack on the James Peninsula that is led by General George B. McClellan. June 12 – John Winter Robinson, the Secretary of State of Kansas, is convicted and removed from office as the result of a bond scandal, becoming the first state executive official to be impeached and removed from office in American history. June 26 – American Civil War: Battle of Mechanicsville – Confederate General Robert E. Lee defeats the troops of General George B. McClellan in the first of the Seven Days Battles. July–September July 1 The Bureau of Internal Revenue, the forerunner of the Internal Revenue Service, is established in the United States. Princess Alice, the second daughter of Queen Victoria, marries Prince Ludwig of Hesse and by Rhine. U.S. President Abraham Lincoln signs into law the Pacific Railroad Acts, authorizing construction of the First Transcontinental Railroad. The Russian State Library is founded, as The Library of the Moscow Public Museum. July 2 – U.S. President Abraham Lincoln signs the Morrill Land-Grant Act into law, creating a system of land-grant colleges, to teach agricultural and mechanical sciences across the United States. July 4 – Charles Dodgson (better known as Lewis Carroll) extemporises the story that becomes Alice's Adventures in Wonderland, for ten-year-old Alice Liddell and her sisters, on a rowboat trip on The Isis from Oxford to Godstow. July 16 – American Civil War: David Farragut becomes the first rear admiral in the U.S. Navy. July 18 – Dent Blanche, one of the highest summits in the Alps, is first ascended. July 23 – American Civil War: Henry Halleck takes command of the Union Army. August 5 – American Civil War: Battle of Baton Rouge – Along the Mississippi River near Baton Rouge,