"when eisenhower left office, he warned the nation about the dangers of increased military spending and the growing power of what he called the: "

It is the informal bond between the military and the arms industry which supplies it. With this alliance,  the military obtains the war weapons and the defense-minded corporations profits to provide them.

Dwight D. Eisenhower discussed the  military-industrial complex in his farewell address on January 17, 1961.

the enslaved people onboard suffered from illness with some frequency

the correct answer is:   the domino theory states that if one country in a region came under the influence of communism, then the surrounding countries would follow in a domino effect.