1. Russia secretly had maps so detailed of the Canadian Arctic during the Cold-War that other ships even now use them over official maps.
2. In the 1930’s starlet Hedy Lamarr invented a new technology to stop Nazi’s from jamming Navy torpedoes, but the idea was rejected until 1962 and implemented during the Cold War. Her frequency hopping technology is also the basis for modern Bluetooth.
3. During the Cold War, the USSR was able to tell a Soviet passport was a forged and fake because the staples in real passports would corrode due to the poor quality of metal.
The answer to this problem is true. The nation makes most of their money through the export of oil.
The invention that effectively ended the era of the "long drives" of the late 19th century was barbed wire, which served both as a barrier and line of defense.
<h3>What is barbed wire?</h3>
Barbed wire is a special type of barrier composed of short clusters of short sharp spikes that limit the pass or movement.
These wires (barbed wire) can be used to separate or delimit a given field or even have functions associated with defense.
In conclusion, the invention that effectively ended the era of the "long drives" of the late 19th century was barbed wire, which served both as a barrier and line of defense.
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The Bureau of Indian Affairs is the answer
