What significant event does Juneteenth commemorate?

Juneteenth commemorates the end of slavery in the United States, specifically marking the moment when enslaved African Americans in Texas learned of their freedom on June 19, 1865. This date is significant because it represents the last holdout of slavery, effectively making it a symbol of freedom and empowerment for Black Americans. The Emancipation Proclamation had been issued by President Abraham Lincoln on January 1, 1863, declaring the freedom of slaves in the Confederate states, but it wasn't until the Union soldiers arrived in Texas that the news reached the enslaved population there. This event is not only a celebration of liberation but also serves as an occasion to reflect on the ongoing struggle for equality and justice.

The other options do not relate to Juneteenth. The end of World War II, the signing of the Declaration of Independence, and the establishment of the US Constitution all represent important milestones in American history but are not connected to the specific commemoration that Juneteenth embodies.