The Proclamation applied in the ten states that were still in rebellion in 1863, and thus did not cover the nearly 500,000 slaves in the slave-holding border states (Missouri, Kentucky, Maryland or Delaware) that had not seceded. Those slaves were freed by later separate state and federal actions.
It was the start of a campaign public law.
Answer:
World War II ended six years and one day after Germany's invasion of Poland on September 1, 1939, sparked the 20th century's second global conflict.