In 1909, the United States supported the conservative-led forces rebelling against President Zelaya. U.S. motives included differences over the proposed Nicaragua Canal, Nicaragua's potential as a destabilizing influence in the region, and Zelaya's attempts to regulate foreign access to Nicaraguan natural resources. On November 18, 1909, U.S. warships were sent to the area after 500 revolutionaries (including two Americans) were executed by order of Zelaya. The U.S. justified the intervention by claiming to protect U.S. lives and property. Zelaya resigned later that year.