Answer:
Military communications have to be coded to keep them secret from the enemy. However the process of coding and decoding are time consuming processes. Furthermore the codes may be broken by the enemy. Nations have devoted considerable effort trying to create unbreakable codes. In World War II both Germany and Japan thought they had such unbreakable codes, but in fact these codes were broken and their most vital information were readily available to their enemies.
Explanation:
It began in 1790 and ended in 1840
Portugal with arrival of Columbus in 1492
<span>The Byzantine Empire made its most important contribution to us by preserving much of the Greco-Roman heritage. Given the fact that the Emperors of Byzantine saw and maintained a great deal of their origins from the later Roman Empire, they managed to preserve major institutions such as the Senate, rules of law, etc.</span>
1.who did they fight
2.why did they fight
3.who won
4.when did it start and when did it end
5.who where the generals
6.who was the president at the time
