Question: What was the main goal of Germany in the battle of the ocean region adjacent to the city where The Golden Palace is set?

Passages:
"The Golden Palace" begins where "The Golden Girls" had ended, in the quartet's now-sold Miami house. With Dorothy Zbornak having married and left in the previous series finale, the three remaining roommates (Sophia Petrillo, Rose Nylund, and Blanche Devereaux) decide to invest in a Miami hotel that is up for sale. The hotel, however, is revealed to have been stripped of all of its personnel in an effort to appear more profitable, leaving only two employees: Roland Wilson, the hotel's manager, and Chuy Castillos, the hotel's chef. This requires the women to perform all the tasks of the hotel's staff. Cuban immigrants in the 1960s brought the Cuban sandwich, medianoche, Cuban espresso, and croquetas, all of which have grown in popularity to all Miamians, and have become symbols of the city's varied cuisine. Today, these are part of the local culture, and can be found throughout the city in window cafés, particularly outside of supermarkets and restaurants. Restaurants such as Versailles restaurant in Little Havana is a landmark eatery of Miami. Located on the Atlantic Ocean, and with a long history as a seaport, Miami is also known for its seafood, with many seafood restaurants located along the Miami River, and in and around Biscayne Bay. Miami is also the home of restaurant chains such as Burger King, Tony Roma's and Benihana. As an island nation, the United Kingdom was highly dependent on imported goods. Britain required more than a million tons of imported material per week in order to be able to survive and fight. In essence, the Battle of the Atlantic was a tonnage war: the Allied struggle to supply Britain and the Axis attempt to stem the flow of merchant shipping that enabled Britain to keep fighting. From 1942 onwards, the Axis also sought to prevent the build - up of Allied supplies and equipment in the British Isles in preparation for the invasion of occupied Europe. The defeat of the U-boat threat was a pre-requisite for pushing back the Axis. The outcome of the battle was a strategic victory for the Allies -- the German blockade failed -- but at great cost: 3,500 merchant ships and 175 warships were sunk in the Atlantic for the loss of 783 U-boats (the majority being Type VII submarines) and 47 German surface warships, including 4 battleships (Scharnhorst, Bismarck, Gneisenau, and Tirpitz), 9 cruisers, 7 raiders, and 27 destroyers. Of the U-boats, 519 were sunk by British, Canadian, or other allied forces, while 175 were destroyed by American forces; 15 were destroyed by Soviets and 73 were scuttled by their crews before the end of the war for various causes.

Supporting sentences:
"The Golden Palace" begins where "The Golden Girls" had ended, in the quartet's now-sold Miami house. Located on the Atlantic Ocean, and with a long history as a seaport, Miami is also known for its seafood, with many seafood restaurants located along the Miami River, and in and around Biscayne Bay. In essence, the Battle of the Atlantic was a tonnage war: the Allied struggle to supply Britain and the Axis attempt to stem the flow of merchant shipping that enabled Britain to keep fighting.