What does the video demonstrate about warfare during World War I?
Conditions in trenches were very difficult.
Trenches were fortified with brick walls.
Soldiers did not use helmets or protective clothing,
Troops lacked communications equipment.

he discover   the sea route around africa hope that ! : )

explanation:

"a shortage of traditional labor created new opportunities in the workplace. a major cause of the internment of japanese americans during world war ii was. racial prejudice. in the early 1940's, the "destroyers-for-military-bases deal" with great britain and the lend-lease act were evidence that the united states."