Some 70 years ago, Hitler's Wehrmacht was chalking up one victory after the next, but then Winston Churchill stood up to the dictator. Their duel decided World War II. The former British prime minister has been viewed as one of the shining lights of the 20th century ever since. Is the reputation justified?
The attorney general I believe who started the "red scare" is Robert K.Murray.
You can go to this site to get information on red scare and those involved.
assuming efficiency of each man to dig trench, in one day, for one hour is constant,

so one man, working for one hour in one day can dig 1.5 m
so 8 men, working 3 hours a day and will take, say $d$ number of days and efficiency will be constant. so,
$\frac32=\frac{220}{8\times3\times d}$
$\implies d=\frac{55}9=6.12$
What does the meaning of life mean to you?