Chronological order of dark ages, Middle Ages, fall of Roman Empire, and beginning of the Christian Era?

The beginning of the Christian Era; The Fall of the Roman Empire; Dark Ages; Middle Ages.

Explanation:

- It is important to note that the last few Western Roman Emperors did in fact convert to some degree to Christianity, though it was much of just word of mouth. The Eastern Empire under Constantine truly converted and allowed Christianity, even making it the state religion. This is the start of the Christian Era, as churches flourished and grew, and the Catholic Church started to increase in power.

- It is important to note that the Middle Ages and the Dark Ages are pretty much the same. The only important differentiation is that the Dark Ages describe only the beginning of the Middle Ages. The Dark Ages is the time period that describes the results of the fall of the Roman Empire. Agriculture was limited to communal and local levels, the high way fell into un-use and broke apart. However, it is not to say that the Dark Ages were truly "dark" through and through. There was shining glimmers of hope, which slowly came about in technological advances (which was recovering from the fall of the Roman Empire), methodology advances (which greatly helped in farming), and other places, which would then set up Europe for the Middle Ages.

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

no every country is held to the same degree as others just some member countries such as the usa and germany are more economically sound so the need to show there support to all others