Answer:
In the United States of America, opponents of immigration typically focus on perceived adverse effects, such as economic costs (job competition and burdens on education and social services); negative environmental impact from accelerated population growth; increased crime rates, and in the long run
Simon Bolivar was a revolutionary, born in Venezuela, who liberated 6 countries in northern South America from Spanish forces sent by the then king of Spain, Bolivar traveled to Europe to ask Spain to withdraw its military forces from America, stop repressing the people and taking advantage of their wealth, but they ignored him, then he returned to South America from where he undertook a battle to free the countries, achieving the objetives and winning almost all of the fights.
They had to limit their army severely and pay heavy reparations which crippled the nation.
Hannibal’s cavalry commander, Maharbal, supposedly uttered the famous phrase: “Hannibal, you know how to gain a victory, but not how to use one.” This came after Hannibal declined to besiege Rome following his victory at Cannae. A major reason for this was that Hannibal was far less skilled at sieges than field battles.
American Farmers faced the dust bowl. Which completely dried up all crops and destroyed most agriculture in the Midwest of the United States.