In the early months of the Great War, Britain’s Royal Navy swept the seas of the Kaiser’s ships and blockaded ports in Germany. The United States was neutral at the time, when over a hundred German vessels sought refuge in American harbors.
The blockade made it impossible for the Central Powers of Germany and Austria-Hungary to import war materiel from overseas while Great Britain, France, and Russia continued to buy products from US farms and factories. American businessmen were happy to sell to any foreign customer who had the cash but for all intents and purposes, such trade was limited to the allies.
To the Central Powers, this trade had the sole purpose of killing their boys on the battlefields of Europe.
The first and most overt reaction from the Kaiser came in the form of unrestrained submarine warfare, when even vessels flying the flags of neutral nations, were attacked. Less apparent at the time, was the covert campaign of sabotage carried out by German agents on US soil.
“Black Tom” was originally an island in New York Harbor, next to Liberty Island. So called after a former resident, by WWI, landfill had expanded the island to become part of Jersey City. The area contained a mile-long pier with warehouses and rail lines and served as a major hub in the trade of war materiel to the allies.
On July 30, 1916, the Black Tom terminal contained over two million pounds of ammunition in freight cars, and a hundred thousand pounds of TNT on a nearby Barge.
Around 2:00 that morning, guards discovered a series of small fires. Some of them tried to put them out while others fled, fearing an explosion. The first and loudest blast took place at 2:08am, a massive detonation estimated at 5.5 on the Richter scale. People from Maryland to Connecticut were awakened in what many believed was an earthquake. The walls of Jersey City’s City Hall were cracked as shrapnel flew through the air. Windows broke as far as 25 miles away while fragments embedded themselves in the clock tower at the Jersey Journal building in Journal Square, over a mile away. The clock stopped at 2:12 am.
Stained Glass windows were shattered at St. Patrick’s Church and Ellis Island was evacuated to Manhattan. Damage done to the Statue of Liberty alone was valued at over $2 million in today’s dollars. To this day, the ladder to Liberty’s torch, remains off limits to visitors.
Known fatalities in the explosion included a Jersey City police officer, a Lehigh Valley Railroad Chief of Police, one ten-week-old infant and a barge captain.
The explosion at Black Tom was the most spectacular but by no means the only such attack. The archives at cia.gov reports: “[B]etween 1915 and spring 1917, 43 American factories suffered explosions or fires of mysterious origin, in addition to the bombs set on some four dozen ships carrying war supplies to the Allies”.
Among those responsible for the Black Tom explosion was Naval Lieutenant Lothar Witzke, arrested on February 1, 1918, in Nogales, AZ. Witzke was convicted by court martial and sentenced to death. President Woodrow Wilson later commuted his sentence, to life.
By 1923, most nations were releasing POWs from the “Great War”, including spies. A prison report from Leavenworth shows Witzke heroically risking his own life in prison, entering a boiler room after an explosion and almost surely averting disaster. It may be on that basis that he was finally released. Imperial German Navy Lieutenant Lothar Witzke was pardoned by President Calvin Coolidge on November 22, 1923 and deported to Berlin, where a grateful nation awarded him the Iron Cross, 1st and 2nd Class.