What were the economic, military and security motivations behind the building of the panama canal?

The economic, military and security motivations behind the building of the Panama Canal were several.

Mainly, the US wanted to build the Panama Canal to establish a quick passage to the Pacific from the Atlantic and vice versa to gain more money. By doing so, it would produce a big economic boost for the US as well as give a military and security advantage for the country, because it would allow much faster troop movements.    

Therefore, building the Panama Canal would bring an economic boost to the country and it would provide military and security, making this Canal the safest Canal.

yes based on alexanders actions he deserved the title of "the great". his empire covered about 3,000 miles and he was able to establish the empire over a 13 year period of time. he was able to conquer many different places. he also defeated the persians. he conquered egypt and developed a city and named it after himself.