Which piece of legislation increased the number of demographics eligible to vote by decreasing the required voting age to 18

The Twenty-sixth Amendment

Explanation:

The Twenty-sixth Amendment to the Constitution allowed all citizens eighteen years of age or older to vote. This amendment decrease the voting age and in doing so, increased the number of demographics eligible to vote. The amendment was born out of student movements. Students argued that, if they were old enough to be drafted into a war, they should also be old enough to make policy choices and have a voice in government.

in 1803 the louisiana purchase took place, doubling the size of the country. by 1840 almost 7 million americans had migrated westward in hopes of securing land and being prosperous. the belief that settlers were destined to expand to the west is often referred to as manifest destiny.

explanation:

the berlin blockade was an international crisis that arose from an attempt by the soviet union, in 1948–49, to force the western allied powers (the united states, the united kingdom, and france) to abandon their post-world war ii jurisdictions in west berlin. in march 1948 the allied powers decided to unite their different occupation zones of germany into a single economic unit. in protest, the soviet representative withdrew from the allied control council. coincident with the introduction of a new deutsche mark in west berlin (as throughout west germany), which the soviets regarded as a violation of agreements with the allies, the soviet occupation forces in eastern germany began a blockade of all rail, road, and water communications between berlin and the west. on june 24 the soviets announced that the four-power administration of berlin had ceased and that the allies no longer had any rights there.