What does Frederick Douglass call slavery in his speech went to the slave is the Fourth of July

It was a scathing speech in which Douglass stated, "This Fourth of July is yours, not mine, You may rejoice, I must mourn."

Explanation:

the  seven  days  battles  were  a series of seven battles over seven  days from june 25 to july 1, 1862, near richmond, virginia,  during  the american civil war. the  seven  days ended with mcclellan's army in relative safety next to the james river, having suffered almost 16,000 casualtiesduring  the retreat.