first off do you know what irish immigration is? you need to know that first
Irish Immigration. Nearly two million Irish people came to the United States from Ireland in the 1840s. Most of them crossed the ocean to escape the potato famine. ... As the Irish immigrants found steady work that allowed them to save money, they sent for friends and relatives.
this info can be found from this source https://www.encyclopedia.com/history/encyclopedias-almanacs...and.../irish-immigration
Answer:
the message is congratulations code breaker
True since most blacks at the time lived in the south