While that argument could almost certainly be made, I think it fails to acknowledge the much larger picture of the world at the time. The US, although not interested in getting itself involved in European affairs, did have world-empire ambitions as evidenced by the Spanish-American War, the opening of China and Japan, and the annexation of the Philippines. Also, there was growing resentment towards Germany for her unrestricted submarine warfare that had already killed numerous Americans on board foreign vessels or transporting goods to warring states. Furthermore, the American people were and still are very interested in the idea of spreading democracy to which Prussian militarism was a major hinderance in Europe. So in answer to your question, yes certainly shipping lanes and protecting trade came into the picture, but they were not the only reasons.
In the shipping lanes, similar to todays roads and highways. (A sea version of highways and roads).
Clearing the Atlantic shipping lanes from the threat of Nazi U-boats and raiders allowed the flow of supplies and personnel to England for the buildup in preparation for the invasion of Europe.
No parts of the continental US. The Japanese imperialistic ambitions were to take over all European colonies for the natural resources they could supply. Also, they grabbed many mid-Pacific islands in order to control and protect the sea lanes connecting their empire to the homeland. Their sneak attack on Hawaii's Pearl Harbor was an attempt to eliminate the only other sea power in the Pacific.
In World Wars I and II, merchant ships carrying supplies to both Russia and Britain were targeted heavily by German U-Boats (submarines). Since there were not enough destroyers and destroyer escorts to protect each individual ship, convoys were formed. In these convoys, a large number of merchant ships were grouped together and protected by a small number of escort vessels.
OK lets start with the pacific after the battle of midway the united states reduced the aerial arm of the Japanese navy by more then 10%. Then on cape Gloucester and the Guadalcanal the marine divisions managed to clear out the shipping lanes that ran from Australia to the western portion of the united states and also managed to relive some of the pressure off the Australians. After the battle of the coral sea rear admerial William F hulsey defeated units of the Japanese navy and again releaved presure twords Australia. You also have to remember that their would never had been an invasion of normandy with out the united states and great britan having to chase down Rommel in the desert. Then in the summer of 1940 the royal air force managed to destroy most of the Luftwaffe during the battle of Britain. Preventing the germans from invading great britan. On the eastern front during the early years of the war the Germans had managed to beat the Russian armies back with in a hundred or so miles of Moscow then managed to turn the tide of war on the eastern front by beating the German army at Stalingrad.
The world's oceans are criss-crossed with busy shipping lanes, hence the reference to roadways.
The US to Mexico shipping lanes cross much of the Gulf of Mexico. They begin at ports in Louisiana, Mississippi, and in Florida. The largest shipping lane exits the US from Miami.
German submarines, or "U-boats", did not CONTROL the shipping lanes, but they were able to intercept and sink a large number of cargo vessels sailing between North America and Europe.
i am sailing a small sail boat from the California coast to the Philippines, and would like to stay clear of the comm. shipping lanes to avoid a collision
Any port around the British Isles was a good hunting ground. The British Isles are ISLANDS. Anywhere vessels enter those ISLANDS was "shipping traffic", or "shipping lanes"; those were always good hunting areas.
for control of shipping lanes.
There are multiple lanes offshore, the majority of the traffic stays 30+ miles offshore
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Ice Breakers
The Navy is part of the armed forces. Their job is to protect the shipping lanes of it's respective country while Marines is a branch of Navy and they're tasked to know how to kill.
cut off there shipping lanes
AMF Bowling World Lanes happened in 2008.