WWII on the US mainland?

The fake quote about Japan not attacking the US because of all the American guns is exactly that: fake. The Japanese attack on Pearl Harbour brought the US into the war, but that was not in the 48 States. The Japanese had their own version of the Doolittle raid, but they used a submarine instead of using an Aircraft carrier. Unfortunately, the type of plane and navigation system meant that the submarine based raids were more a morale booster for the Japanese than a significant action.

Likewise, There were things like the Bombardment of Ellwood, CA by submarine.  And the Japanese firebomb baloon programme which were also dismal failures. The bottom line was that most WWII bombers did not have the range to attack the mainland US.  The Germans did have their Amerika Bomber programme, which fortunately didn't get anywhere.  Even more fortunately, the German rocket and heavy water programmes never got anywhere either.
So, it was primarily logistics and inability to hit the US mainland which is far more of a reason the US was never attacked.

Still, there was also a sea war off the coast of the US. The period from January to around August 1942 was called the Second Happy Time, or American Shooting Season, by German U-Boat Commanders. US Anti-submarine defense measures were weak and disorganized during
that period The U-boats were able to inflict massive damage with little risk. During this period, Axis submarines sank 609 ships totaling 3.1 million tons and the loss of thousands of lives, mainly those of merchant mariners, against a loss of only 22 U-boats. This was roughly one quarter of all shipping sunk by U-boats during the entire Second World War.

  The German submarine U-869 was found off the coast of New Jersey in 1991. The U-550 was found off the Coast of Massachusetts in 2012.  The latest find is in North Carolina.  Unlike the other two U-boats I mentioned, this one also has one of its victims nearby.

A research team using sonar found the wrecks of U-boat 576 and the freighter Bluefields on 30 August in waters off Cape Hatteras, just 240 yards apart. The U-boat had attacked the Bluefields, which was operating under the flag of Nicaragua and was part of a convoy of 19 merchant ships.

There are at least another 19 of these German submarines lying off the US Coast.

The reality is that North America was attacked during WWII, but most of those have been forgotten due to the ineffectiveness and relative insignificance of the attacks on the US Mainland.  The reality was that it wasn't guns that kept the US from being attacked as much as other strategic considerations which made a large scale attack, like that at Pearl Harbour, unlikely.


See also:

• Misquoting Yamamoto
  
• Japanese Bomb the Continental U. S. West Coast
• Japanese bombing of the US West Coast in WWII
• Attacks on North American in WWII
• BBC News - WW2 U-boat found with ship it sank off North Carolina
• Wreck of German U-boat and ship it sank found off North Carolina coast | US news | theguardian.com 
• US Coastal Defences WWII

Misquoting Yamamoto

It's fun how the gunloon lives in a world of alternative history.
Perhaps the most often used bogus quote is attributed to Adolf Hitler. Usually, the questionable passage reads as follows:

1935 will go down in History! For the first time, a civilized nation has full gun registration! Our streets will be safer, our police more efficient and the world will follow our lead to the future!

Note: This passage sometimes features different punctuation and slight wording changes including a beginning of, ‘For the first time in history, a....’ Various citations include: Adolf Hitler, April 15, 1935, in address to the Reichstag; Adolf Hitler 1935 'Berlin Daily' (Loose English Translation) April 15th, 1935 Page 3 Article 2 by Einleitung Von Eberhard Beckmann -"Abschied vom Hessenland!". "Adolf" is sometimes misspelled as ‘Adolph’ on the Internet.
While the above 'quote' makes a nice T-shirt, there are numerous problems with this alleged statement. (1) It violates the rule of not beginning a sentence with a number. (2) It isn’t phrased in Hitler’s style. (3) Major changes to the German gun laws occurred in 1928 and 1931 (under the Weimar Republic) and in 1938 (under the Nazi’s). No significant changes happened in the gun registration laws in 1935. Furthermore, the changes in 1928 and 1931 were designed to disarm the Nazis and Communists and therefore it is doubtful that Hitler would trumpet the success of any law aimed at his goon squads.
Unfortunately, the major problem is that the first "civilized nation" that required anyone wanting to purchase or own a firearm or ammunition to obtain a firearm certificate was Great Britain with 1920 Firearms Act. Strangely enough, there hasn't been a genocide in the UK.
Likewise, advocates of gun rights often argue that in World War II Japan was deterred from invading the U.S. mainland by a fear of American citizens with guns in their closets. They frequently quote Japan’s Admiral Isoroku Yamamoto as saying: "You cannot invade mainland United States. There would be a rifle behind each blade of grass."
FactCheck.org looked into this quotation and determined that:

this quote is unsubstantiated and almost certainly bogus, even though it has been repeated thousands of times in various Internet postings. There is no record of the commander in chief of Japan’s wartime fleet ever saying it.

According to Wikiquote, the blade of grass quote is one of two incorrectly attribute to Admiral Yamamoto.