Coast Patrol

First published in Thrilling Adventures, January 1943. Reprinted in the collections Beyond The Great Snow Mountains and The Collected Short Stories of Louis L'Amour - Volume 4: The Adventure Stories.
The year is like 1942. When Turk Madden is hired by the Russians to fly coastal spotting missions just north of Vladivostok, he expected trouble. He got it in the form of an American cargo ship dealing with a mutiny. It is then he learns about the Japanese attack on Pearl Harbor and realizes that the Japanese current truce with the Soviets might not extend to the American vessel.