What i migrations from blank and blank worked on building railroads alongside African Americans and Mexicans Americans were?

Answer 1

The migrations of Chinese and Irish immigrants played a significant role in building railroads alongside African Americans and Mexican Americans in the United States. Chinese laborers were heavily involved in constructing the Central Pacific Railroad, while Irish immigrants worked on the Union Pacific Railroad. This collaboration was crucial for the completion of the Transcontinental Railroad, which connected the East and West coasts and significantly impacted American commerce and travel. Their contributions highlight the diverse workforce that helped shape the nation's infrastructure during the 19th century.