Was the danger of Germany bombing the US East Coast taken seriously and were measures taken to address it?

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Accepted answer

Was the danger of Germany bombing the US East Coast taken seriously and were measures taken to address it?

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Short Answer:
Very seriously. on both coasts. In retrospect more serious than was probable reasonable. A US air and sea defensive system was brought online beginning in 1940 modeled after the British front line air and sea programs which at the time were winning the Battle of Britain. Their were millions involved. Plane spotters and air wardens and coastal defenses built on both coasts. But beyond the coasts the program was active hundreds of miles inland and around the country. Submarines were an especially big issue on the east coast early on. German submarines patrolled and took merchant shipping within eyesite of America's largest cities.

The War That Never Came: Civilian Defense in Cincinnati, Ohio During World War II
During World War II the Office of Civilian Defense (OCD), a federal agency, encouraged more than ten million Americans to volunteer their time and effort for all types of defense-related activities that provided psychological and material benefits for the home front. The agency's top priority was civilian protection. By the summer of 1941, air raid precautions modeled after Great Britain's during the blitz had been developed in the United States. Treated solemnly by many, especially in the aftermath of Pearl Harbor, civilian protection was seen as America's last line of defense.

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Detailed Answer:
In the 1960's I toured a series of watch tower fortifications on the DelMarva Peninsula. They were basically concrete bunkers with a tower for coastal watching. These were built all up and down the east coast. On the coast both planes and and ships were aggressively watched for. They also looked for spies and sabatours landings on the beaches. Caught a few too.

7 crazy things the Coast Guard did during World War II In June, 1942, a German U-boat surfaced off the coast of New York and dropped off a team of four saboteurs that made their way to the coast. Their goal was to cripple U.S. aluminum production and hydroelectric power production through a terror campaign, weakening the U.S. and hopefully coercing the U.S. population to vote against the war. The endeavor was quickly foiled thanks to the Coast Guard beach patrol.

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German saboteurs executed in Washington, D.C.

I remember a German u-boat commander Hardegen, who sank about 24 ships in American waters on two patrols in 1942. The most famous one which always sticks with me was one I heard about as a kid, many years after the fact. He sank a ship right off the coast of Coney Island, New York and people on the Ferris wheel got a good view of his Uboat. Commander Hardegen was a very professional fellow. He had hit the merchant man with a torpedo and it was on fire but still afloat. Commander Hardegen then surfaced to finish the ship off with his deck gun. Only he decided to circle the ship and come in from the shore side so his deck gun would not accidently take out people at the amus*m*nt park. ( we know this because he was interviewed after the war. ) Only when he did so his uboat was illuminated to the horrified people on shore could see his ship go in for the coup de grace. It was a kind of game changer at the home front. That really struck home with the people of the US.

U-boat commander who menaced American Shores

I also have some pictures of my Grandfather who was an air warden in Cincinnati Ohio. He had an armband and a WWI style helmet. When I questioned him about it, as a kid. He said they did things like plane spotting and walked the streets during black outs to make sure people turned off their lights or if in a car pulled over and turned off their headlights. Cincinnati is about 600 miles from the coast.

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WWII documents reveal importance of air raid wardens

One more story for you. Washington DC is about 200 miles from the coast. During WW2 there were anti aircraft guns placed around important American Cities including Washington DC. One of these sites on the Capital Mall right near the federal center (legislature, and whitehouse). The soldiers manning there gun fired it. Not sure if it was because they misidentified a plane or β€œthe battery went off by itself”. The net effect was they hit/shelled the Lincoln memorial. The us park service at the memorial will proudly state that the Lincoln Memorial is the only Federal Memorial ever to come under fire during war time. Always thought that their pride kinda came at the expense of the US army.

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Washington During Wartime One overeager air defense soldier accidentally machine gunned the Lincoln Memorial in 1942 (seriously, this actually happened). Unfortunately, the only contemporary news coverage of this incredible event was a brief Washington Post story, and an even shorter NYT blurb. οΏΌ

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Yes it was. US airplane manufacturers like Boeing and Lockheed moved their factories to the Middle of the US to build planes and bombers, Believing the German's couldn't traverse "Flyover" country, 1000 miles inland to attack crucial factories.

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At Capt May, New Jersey, where my family used to go for summer vacations, there is or was a concrete tower built to watch the coast. The last time I was in that part of town I didn't see it, and I can't find it on Google Maps, so maybe it has been demolished.

On the beach, almost to Cape May Point, there is Battery 223, a concrete gun emplacement b about 100 feet by 50 feet. The last time I saw it it was a crazy and terrifying structure, a huge concrete building supported above the ground by many wooden pilings. It was originally more or less buried in sand dunes and has been uncovered by erosion by the sea. Battery 223 was completed in 1943 and decommissioned in 1944.

https://en.wikipedia.org/wiki/Battery_2231

So I have never doubted that the US government took coastal defense very seriously during World War Two.

It is not so easy to find concrete evidence of air raid concerns. But no doubt a significant proportion of the US public was worried about possible air raids, and so the government instituted blackouts and air raid drills and other precautions partially to humor those people and partialy to be prepared just in case.

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Not exactly the East Coast but the Soo Locks in Michigan were vital to the US war effort (90% of the country's iron ore went through them at the time) and were heavily guarded.

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Ironically, it was Japan, nominally the weaker of the two powers, that gave credence to these fears.

  1. Japan Actually bombed Pearl Harbor. Hawaii was then a U.S. possession, and is now a U.S. state. More to the point, they could have bombed California (although this would have been highly risky). Germany did have industrial capacity that was a multiple of Japan's.

  2. The Japanese launched "balloon bombs", some of which reached West coast states like Oregon. These were "unmanned" bombers, that blackouts would not have affected.

It's only with the benefit of hindsight that we know that Germany was not a real threat to the bomb the east coast.

  1. Unlike Japan, Germany had no aircraft carriers. (But one, the Graf Zeppelin, was under construction.)

  2. Germany did not yet have long range bombers, or bases close enough to America. If they had somehow managed to capture Greenland, they might have been able to bomb Nova Scotia, but not the United States. They had on the "drawing board" the so-called "Amerikabomber". a transcontinental bomber that would supposedly span the Atlantic.

  3. Germany was known to be working on other advanced "wonder weapons," most of which did not come to fruition in World War II. They included the atomic bomb (discovered by America but not Germany), and the sun gun (never off the drawing board). Perhaps their greatest success were the V-2 missiles sent against England. German advances in rocketry would eventually lead to cruise missiles that could be launched off submarines, but we didn't know about the "eventually" part.

  4. Germany had already "punched" above its weight in World War II. In early 1942, the "tire had not yet hit the road" at Stalingrad and North Africa that showed that the Germans were not superhuman.

So while there was no "real" German threat, there were just enough reasons, given the "fog of war," for people on the American east coast to plausibly fear and take precautions against a German bombing threat.

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