How the Measure Developed in Music Notation. Music bars and barlines didn't always exist in music notation. Some of the earliest uses of barlines, which create measures, were in keyboard music in the 15th and 16th centuries. Although barlines create metered measures today, that wasn't the case back then.
The Emancipation Proclamation 1863. On Jan. 1, 1863, U.S. President Abraham Lincoln declared free all slaves residing in territory in rebellion against the federal government. This Emancipation Proclamation actually freed few people. It did not apply to slaves in border states fighting on the Union side; nor did it affect slaves in southern areas already under Union control. Naturally, the states in rebellion did not act on Lincoln's order.
The document that President Abraham Lincoln used to free the slaves was called the Emancipation Proclamation. It freed slaves in the rebelling Southern states only, not border states. They were freed later. As Lincoln had no authority to free slaves, this was a war measure. The results were that slaves in areas captured by Union forces were freed.