You didn't really provide any options here but we can safely say that Alexander's army (if you're talking about the army of Alexander the Great) was alert because they were trespassing in foreign terain where they could be attacked at any time.
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Civil law I'm pretty sure, hope this helped :)
Answer:
i think it's Britain ........
I will go with religion because Religion to me have been the oldest of all the option given. It is the only thing that connect the world.
<h2>According to tradition, on April 21, 753 B.C., Romulus and his twin brother, Remus, found Rome on the site where they were suckled by a she-wolf as orphaned infants. According to the legend, Romulus and Remus were the sons of Rhea Silvia, the daughter of King Numitor of Alba Longa.</h2>
<h2>please mark in brain list </h2>
