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SUBMARINES AND ARMED MER

CHANTMEN

Informal and Confidential Letter from the Secretary of

State to the British Ambassador*

Department of State,

Washington, January 18, 1916. MY DEAR MR. AMBASSADOR :

It is a matter of the deepest interest to my Government to bring to an end, if possible, the dangers to life which attend the use of submarines as at present employed in destroying enemy commerce on the high seas, since on any merchant vessel of belligerent nationality there may be citizens of the United States who have taken passage or are members of the crew, in the exercise of their recognized rights as neutrals. I assume that Your Excellency's Government are equally solicitous to protect their nations from the exceptional hazards which are presented by their passage on a merchant vessel through those portions of the high seas in which undersea craft of their enemy are operating.

While I am fully alive to the appalling loss of life among noncombatants, regardless of age or sex, which has resulted from the present method of destroying merchant vessels without removing the persons on board to places of safety, and while I view that practice as contrary to those humane principles which should control belligerents in the conduct of their naval operations, I

* Same to the Ambassador of France, the Russian Ambassador, the Ambassador of Italy, the Belgian Minister, and, on January 24, 1916, to the Japanese Ambassador.

do not feel that a belligerent should be deprived of the proper use of submarines in the interruption of enemy commerce since those instruments of war have proven their effectiveness in this particular branch of warfare on the high seas.

In order to bring submarine warfare within the general rules of international law and the principles of humanity without destroying its efficiency in the destruction of commerce, I believe that a formula may be found which, though it may require slight modifications of the practice generally followed by nations prior to the employment of submarines, will appeal to the sense of justice and fairness of all the belligerents in the present war.

Your Excellency will understand that in seeking a formula or rule of this nature I approach it of necessity from the point of view of a neutral, but I believe that it will be equally efficacious in preserving the lives of all noncombatants on merchant vessels of belligerent nationality.

My comments on this subject are predicated on the following propositions:

1. A noncombatant has a right to traverse the high seas in a merchant vessel entitled to fly a belligerent flag and to rely upon the observance of the rules of international law and principles of humanity if the vessel is approached by a naval vessel of another belligerent.

2. A merchant vessel of enemy nationality should not be attacked without being ordered to stop.

3. An enemy merchant vessel, when ordered to do so by a belligerent submarine, should immediately stop.

4. Such vessel should not be attacked after being ordered to stop unless it attempts to flee or to resist, and in case it ceases to flee or resist, the attack should discontinue.

5. In the event that it is impossible to place a prize crew on board of an enemy merchant vessel or convoy it into port, the vessel may be sunk, provided the crew and passengers have been removed to a place of safety.

In complying with the foregoing propositions which, in my opinion, embody the principal rules, the strict observance of which will insure the life of a noncombatant on a merchant vessel which is intercepted by a submarine, I am not unmindful of the obstacles which would be met by undersea craft as commerce destroyers.

Prior to the year 1915 belligerent operations against enemy commerce on the high seas had been conducted with cruisers carrying heavy armaments. Under these conditions international law appeared to permit a merchant vessel to carry an armament for defensive purposes without losing its character as a private commercial vessel. This right seems to have been predicated on the superior defensive strength of ships of war, and the limitation of armament to have been dependent on the fact that it could not be used effectively in offense against enemy naval vessels, while it could defend the merchantmen against the generally inferior armament of piratical ships and privateers.

The use of the submarine, however, has changed these relations. Comparison of the defensive strength of a cruiser and a submarine shows that the latter, relying for protection on its power to submerge, is almost defenseless in point of construction. Even a merchant ship carrying a small caliber gun would be able to use it effectively for offense against a submarine. Moreover, pirates and sea rovers have been swept from the main trade channels of the seas, and privateering has been abolished. Consequently, the placing of guns on merchantmen at the present day of submarine warfare can

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be explained only on the ground of a purpose to render merchantmen superior in force to submarines and to prevent warning and visit and search by them. Any armament, therefore, on a merchant vessel would seem to have the character of an offensive armament.

If a submarine is required to stop and search a merchant vessel on the high seas and, in case it is found that she is of enemy character and that conditions necessitate her destruction, to remove to a place of safety all persons on board, it would not seem just or reasonable that the submarine should be compelled, while complying with these requirements, to expose itself to almost certain destruction by the guns on board the merchant vessel.

It would, therefore, appear to be a reasonable and reciprocally just arrangement if it could be agreed by the opposing belligerents that submarines should be caused to adhere strictly to the rules of international law in the matter of stopping and searching merchant vessels, determining their belligerent nationality, and removing the crews and passengers to places of safety before sinking the vessels as prizes of war, and that merchant vessels of belligerent nationality should be prohibited and prevented from carrying any armament whatsoever.

In presenting this formula as a basis for conditional declarations by the belligerent Governments, I do so in the full conviction that your Government will consider primarily the humane purpose of saving the lives of innocent people rather than the insistence upon a doubtful legal right which may be denied on account of new conditions.

I would be pleased if you would be good enough to bring this suggestion to the attention of your Government and inform me of their views upon the subject, and whether they would be willing to make such a declaration conditioned upon their enemies making a similar declaration.

A communication similar to this one has been addressed to the Ambassadors of France, Russia, and Italy, and the Minister of Belgium at this capital.

I should add that my Government is impressed with the reasonableness of the argument that a merchant vessel carrying an armament of any sort, in view of the character of submarine warfare and the defensive weakness of undersea craft, should be held to be an auxiliary cruiser and so treated by a neutral as well as by a belligerent Government, and is seriously considering instructing its officials accordingly. I am, etc.,

ROBERT LANSING.

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