Prior to the passage of the 25th amendment, if a vice president left office,

Prior to the passage of the 25th Amendment, if a vice president left office, the office remained vacant until the following election.

Explanation:

The Twenty-fifth Amendment to the Constitution of the United States deals with the succession of the President of the United States, and establishes the procedures to be followed to occupy the position of Vice President in case this position becomes vacant, in addition to what must be made to find the president disqualified to continue in his position. It replaces the ambiguous text of Article II, Section 1, Clause 6 of the Constitution, which does not expressly state whether the vice president becomes the president, or if he acts as acting president (provisional) if the president dies, resigns, is ceased his office, or is unable for any reason to comply with the obligations of the office.

by 1890, the united states had by far the world's most productive economy. american industry produced twice as much as its closest competitor--britain. but the united states was not a great military or diplomatic power. its army numbered less than 30,000 troops, and its navy had only about 10,000 seamen. britain's army was five times the size of its american counterpart, and its navy was ten times bigger. the united states' military was small because the country was situated between two large oceans and was surrounded by weak or friendly nations. it faced no serious military threats and had little interest in asserting military power overseas.

because of its location and commercial importance, atlanta was used as a center for military operations and as a supply route by the confederate army during the civil war. therefore, it also became a target for the union army. general william tecumseh sherman and his troops captured the city in 1864.