Every nation considers spying to be a crime, particularly during times of war. Their own spies are exempted, of course. It's only a crime if some other nation is doing it.
Julius and Ethel Rosenberg . ~ Look to the related link below .
Because they thought of him as a traitor for spying for Britain.
Before World War 1, airplanes were used for recreation. However, during World War 1 airplanes were used for reconnaissance and spying on the enemies. Airplanes were also used as fighter jets and as bombers. Airplanes changed warfare greatly and allowed for blitz attacks and air warfare.
no, there was nothing illegal about the camps, many counties employed them (including the USA), it was what was going on in them that was wrong.
Both the Prohibition movement and the women's suffrage movement grew during World War 1. The former aimed to make alcohol illegal and the latter aimed to give women the right to vote.
Mata Hari
To prevent them from spying or committing sabotage
Yes, that is normal practice for all major powers.
During WWII there was a fear of american Japanese spying for japan. Weary of this the government put every japanese in camps to prevent them from spying.However no Japanese american was ever convited of spying yet a few white americans where convicted of spying.
Miss Jenny was a spy for the British. She was spying on the American's and the French during the Revolutionary War.
Rosengberg
Yes. The Union and the Confederate armies both used them for spying during the Civil War.
There has been spying going on between nations for a long time but actual organized spying on the Soviet Union began after world war one and then really got serious after world war two.
Julius and Ethel Rosenberg . ~ Look to the related link below .
I think it is chemical gas...
The Neutrality Acts made it illegal to sell arms to other countries during World War 2. This was an act that still took place but people were doing it secretly to gain their own money from the trade.
Because the leaders of Britain and USA were frightened they would be tempted to secretly fight for Japan and commit acts of sabotage and spying.