Read this paragraph from the dark game.
what is the best summary of this paragraph?
another thing that changed very little in the years between
the wars was the means of obtaining military intelligence,
although the use of photography and the telegraph brought
some technological advances, the craft of spying on the
enemy's army still relied on fieldwork. for the most part,
intelligence was gathered in simple ways. prisoners of war
and deserters were interrogated. the union army was
always interested in hearing what runaway slaves had to
report. and, of course, both armies relied on cavalry scouts,
signal intercepts, visual observation, and captured
correspondence.
during the civil war, intelligence was gathered in the
same ways it had been gathered in previous wars.
photography and the telegraph were some of the
technological advances that were used in civil war
espionage.
most espionage during the civil war was fieldwork that
included observation, scouting, and interrogation of
prisoners.
enslaved persons that ran away, as well as prisoners
from the union army, were good sources of information
during the civil war.