Treacherous Passage, Germany's Secret Plot against the United States in Mexico during World War I, Potomac Books, Bill Mills,First World War,Specific wars and military campaigns, History;Military History;Military Studies;World War I;WWI;Great War;Latin American History;Latin American Studies;Mexico;Mexican Republic;American History;German-Mexican Army;Invasion;Sabotage;Submarine Base;Mexican Coast;Sea Raiders;Mexican Port;Mazatlan;Allies;Allied Merchant Shipping;Pacific Ocean;Secret Agent;Fritz Unger;U-Boat;Allied Merchantmen;Gunboat;German Secret Service;American Spy;U S State Department;Allied Shipping;Espionage,, , United States, en-UShttps://www.nebraskapress.unl.eduHistory;Military History;Military Studies;World War I;WWI;Great War;Latin American History;Latin American Studies;Mexico;Mexican Republic;American History;German-Mexican Army;Invasion;Sabotage;Submarine Base;Mexican Coast;Sea Raiders;Mexican Port;Mazatlan;Allies;Allied Merchant Shipping;Pacific Ocean;Secret Agent;Fritz Unger;U-Boat;Allied Merchantmen;Gunboat;German Secret Service;American Spy;U S State Department;Allied Shipping;Espionage, [BLURB],[CITY],Nebraska,books, ebooks, biblet, Book2look