Summarizing Central Ideas in The Dark Game, Part 1 Instruction Active
Identifying the Central Idea
Tyt
What is the central idea of the 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.
-The Dark Game,
Paul Janeczko
Technological advances made a difference in the
craft of spying
Interrogations are an important way to obtain
information
The Union army gathered stories from runaway
slaves,
Intelligence was often gathered in simple ways,
such as relying on fieldwork
Previous Activity
USIS

Intelligence was often gathered in simple ways,  such as relying on fieldwork.

Explanation:

In the book The Dark Game by Paul Janeczko contains classified spy stories about how the American government maintained its power. The stories relating to espionage and intelligence, the spy world, and the use of secret agents to gain information about other countries are all included in this book.

In the given excerpt, Paul talks about how information is gathered in the spy world. Even though photography and the telegraph have helped simplified the relay of messages and military information, the craft of spying still relies on the age-old method of gathering intelligence from "fieldwork", talking to "prisoners of war and deserters". They still form the major source of gathering information.

Thus, the central idea of the passage is that intelligence is often gathered in much simpler ways despite the use of telegraphs and photography.  

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