A German U-Boat sinks the Lusitania, which is carrying several Americans, resulting in heightened political tension between Germany and the US. As a result of a U.S. campaign, Germany issued an apology and promised payments on 5 October. On 7 December, President Wilson asked for a military fund increase.
Richert, Lucas Paul. "Lusitania sunk". The Literary Encyclopedia. First published 01 October 2008
[http://www.litencyc.com/php/stopics.php?rec=true&UID=2845, accessed 22 December 2014.]