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From 1860-1910, the two main ports were Ellis Island, New York, an Boston, Massachusetts.
Two, Alaska and Hawaii
london and florida
The Answer is Maine and Vermont
Airfields were the primary entry & departure points for US personnel from the late 60s thru the 70s for RVN. Cam Ranh Bay and Bien Hoa were the two main entry/departure points flown primarily by US gov't chartered civilian commerical airliners...Braniff, TWA, Flying Tiger Airlines, etc were some of them.
For the United States: The US Civil War 1861-1865, WWII (US Entry) 1941-1945, and WWI (US Entry) 1917-1918.
As the US Civil War began to unfold, the USA was sectionalized. The two main and competing sections were the "Northern" and "Southern" states. The US's western frontiers were either territories or US states with low populations.
There were two main routes in the US for runaway slaves. One main route went from Maryland to Pennsylvania and ended up in New York and New England states. The other main avenue of escape ran up the Mississippi Valley to the slave-free Midwestern states.
The two main political divisions of LAND in the US are the states and the District of Columbia. Some additional examples are US Territories and American Indian Reservations.
lowa
because it was one of the main states of our nation.
The two main designs are the obverse and reverse of the Great Seal of the United States.