In the 19th century, manifest destiny was widely held belief in the united states and its settlers were destined to expand across North America
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Two contributing factors were the Soviet invasion of Afghanistan and the election of Ronald Reagan in 1980. ... Changes of leadership elsewhere – such as Margaret Thatcher's election in Britain and Brezhnev's decline in the USSR – also contributed to this revival of Cold War tensions.
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A candidate needs the vote of at least 270 electors—more than half of all electors—to win the presidential election.
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<span>The Molotov–Ribbentrop Pact, also known as the Nazi–Soviet Pact, the German–Soviet Non-aggression Pact or the Nazi German–Soviet Pact of Aggression</span>
The availability of cheap steel allowed larger bridges, railroads, skyscrapers, and ships. Other important steel products were steel cable, steel rod, and sheet steel, which enabled large, high-pressure boilers and high-tensile strength steel for machinery. Military equipment also improved significantly.