The Japanese did not set up their attack on Pearl Harbor, Hawaii and subsequent declaration of war against the United States and other soon to be allied powers in World War II for the convenience of U.S. mainland newspapers. That's pretty clear from the extra editions that emerged from various news rooms.
As those extras were emerging, Guam was under attack from planes based on Saipan.
These small outfits did a pretty good job of putting out the information that they had in hand.
But leave it to the tiny--to this day--Iola, Kansas Register--to break out the same type that they likely used for the outbreak of the Spanish-American War. And guess what? They actually got the bombing of Guam on their antiquated front page.