UN General Assembly
1956

119. Present means of transport and communication make it impossible for stocks of arms to be built up in a given State in anticipation of the expected arrival of so-called volunteers. When these volunteers were able to take up the arms which had been sent ahead of them, a very strange case of war would ensue; from a legal point of view, the country that supplied the arms and the men could not be declared responsible. Thus it would be possible for a powerful State to wage war and make it appear as though it was being waged by another country. Not only would the law be violated, but it would be flouted and paralyzed.