Question: Who sent naval ships to the body of water that joins the Atlantic and the sea where the Rhine ends?

<P0-S0> The Rhine (Romansh: Rein, German: Rhein, French: le Rhin, Dutch: Rijn) is a European river that begins in the Swiss canton of Graubünden in the southeastern Swiss Alps, forms part of the Swiss-Austrian, Swiss-Liechtenstein border, Swiss-German and then the Franco-German border, then flows through the Rhineland and eventually empties into the North Sea in the Netherlands. <P0-S1> The biggest city on the river Rhine is Cologne, Germany with a population of more than 1,050,000 people. <P0-S2> It is the second-longest river in Central and Western Europe (after the Danube), at about 1,230 km (760 mi),[note 2][note 1] with an average discharge of about 2,900 m3/s (100,000 cu ft/s). <SEP> <P1-S0> The North Sea is bounded by the Orkney Islands and east coast of Great Britain to the west and the northern and central European mainland to the east and south, including Norway, Denmark, Germany, the Netherlands, Belgium, and France. <P1-S1> In the southwest, beyond the Straits of Dover, the North Sea becomes the English Channel connecting to the Atlantic Ocean. <P1-S2> In the east, it connects to the Baltic Sea via the Skagerrak and Kattegat, narrow straits that separate Denmark from Norway and Sweden respectively. <P1-S3> In the north it is bordered by the Shetland Islands, and connects with the Norwegian Sea, which lies in the very north - eastern part of the Atlantic. <SEP> <P2-S0> ``the buck stops here ''is a phrase that was popularized by u.s. president harry s. truman, who kept a sign with that phrase on his desk in the oval office. <P2-S1> the phrase refers to the notion that the president has to make the decisions and accept the ultimate responsibility for those decisions. <P2-S2> truman received the sign as a gift from a prison warden who was also an avid poker player. <P2-S3> it is also the motto of the u.s. naval aircraft carrier uss harry s. truman (cvn - 75). <SEP> <P3-S0> After having declined in size following the subjugation of the Mediterranean, the Roman navy underwent short-term upgrading and revitalisation in the late Republic to meet several new demands. <P3-S1> Under Caesar, an invasion fleet was assembled in the English Channel to allow the invasion of Britannia; under Pompey, a large fleet was raised in the Mediterranean Sea to clear the sea of Cilician pirates. <P3-S2> During the civil war that followed, as many as a thousand ships were either constructed or pressed into service from Greek cities. <SEP> <P4-S0> the french marines and naval infantry intended for the invasion of northern germany were dispatched to reinforce the french army of châlons and fell into captivity at sedan along with napoleon iii. <P4-S1> a shortage of officers, following the capture of most of the professional french army at the siege of metz and at the battle of sedan, led naval officers to be sent from their ships to command hastily assembled reservists of the garde mobile. <P4-S2> as the autumn storms of the north sea forced the return of more of the french ships, the blockade of the north german ports diminished and in september 1870 the french navy abandoned the blockade for the winter. <P4-S3> the rest of the navy retired to ports along the english channel and remained in port for the rest of the war.