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the discovery of mineral deposits
California
my butt
The major factor that led to a flood of Irish immigrants to the U.S. in the 1840s and 1850s is the potato famine which led to starvation and the deaths of almost half of the Irish population.
700
Mine Gold
In river beds.
California (the west)
The Mexican States of Alta California and Nuevo Mexico.
cheap land and to strick it rich from mining gold.
whites
It took 4 months and it was harsh.