In 1914, Britain declared war on Germany while the United States proclaimed its neutrality.

CNN: Sunday,

The Initiative shall work on behalf of the entire Nation and shall exercise strict neutrality with regard to specific locations within the United States.

WHITEHOUSE: Executive Order 13577--SelectUSA Initiative

Anyone responsible could be prosecuted under the Neutrality Act, which bans military actions against a country with which the United States is not at war.

ECONOMIST: Cuba