Travel by water was quicker and better for long distance. However boats need to be built and are bulky. Travel by land is stealthier. Both have safety risks. Storms and jagged rock play a risk in water transportation. Land transportation can also be more exhausting, and more suspect to pillaging.
In 1907, Britain, France and Russia formed a military alliance for WWI, known as the Triple Entente.
Answer:
Cuba, Haiti and the Dominican Republic were very important for the emerging American power in the Caribbean because they were territories formerly in the possession of the European powers (Spain and France), which once independent limited the power of these nations in the region.
Thus, the fact that Cuba, Haiti and the Dominican Republic were constituted as independent nations caused the European colonial powers to lose weight in the Caribbean Sea, leaving a power vacuum that was used by the United States to establish itself as the main power of the region.