Question

By 1860, ___________ had become the largest city as its population surpassed one million. boston philadelphia baltimore new orleans new york

Answer 1

new york

Step-by-step explanation:

Answer 2

New York--In 1860, New York was the largest city in the US.

Large numbers of immigrants and growing trade led to New York being the largest US city. The city would continue to grow after the Civil War to become the hub to immigrants and the center of US trade.