Why were the germans so eager to go to war ?

answer:

They weren’t. If you recall, the war was started by the UK and France, not Germany. Hitler gambled that he could invade Poland without anybody taking any action. He was wrong. And people still debate whether the UK was right in declaring war.

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