Word used for the day the war ended and that literally meant "stop shooting".

treaty
armistice
veteran
casualty

Armistice

Explanation:

Armistice is the word used for the day the war ended and that literally meant "stop shooting".

Explanation:

An armistice is a temporary interruption of a war or other armed conflict. In the event of an armed conflict, parties in the dispute may be tried to persuade an armistice to reopen the negotiating link. In this case, it is understood that the parties will not conduct hostilities against one another after a specified period of time. The settlement may be limited in scope or duration.  

An armistice can take years if states do not enter into a peace treaty in which they define all issues of war or conflict.

The armistice is preceded by a ceasefire, in which the immediate military action is stopped, but the troops remain stationed ready to continue fighting.

the answer to your question is a. the salt plains

in 1811, he led an expedition, known as the george c. sibley expedition, to improve relations with the pawnee and kansa tribes, and also to locate the rumored jefferson's salt mountain