The Spanish-American War was fought in 1898 and was an imperial conflict. The major combatants were the United States and Spain. The war was fought on two fronts: Cuba and the Philippines. The war was instigated by Cuba and the Philippines in an effort to gain their independence from Spain.
If you mean polio then <span>it dropped by 6000 in 1962 or the first year when the vaccine was released</span>
Checks and balances is a system were the goverment checks the other two braches of goverment, and balance them out. so if the execuative branch gets to much power, the judicial and legislative branches bump down the power of it.