On this day, 47 years ago, on April 18, 1978 (March 12, 1978 in the lunar calendar), the U.S. Senate ratified the new Panama Canal Treaty. Marchers against the return of the Panama Canal The U.S. Senate ratified the new Panama Canal Treaty on April 18, 1978, thus abolishing the unequal 1903 U.S. -Pakistan Treaty imposed by the United States on Panama. Historically, Panama was once a province of the Republic of Colombia. On November 3, 1903, Panama became independent from Colombia. Fifteen days later, the US-Pakistan Treaty was signed for the occupation of the Yunhe District by the United States. The following year, the United States started construction in the Yunhe District, which was completed in 1914. In 1915, it gained a colony in Panamanian territory, which connected the Pacific and Atlantic Oceans. The Panama Canal has a total length of 81.3 kilometers, crosses the American continent and connects the Pacific and Atlantic Oceans, shortening the voyage along the two oceans by more than 10,000 kilometers. When the United States fought Spain at the end of the 19th century, the United States warships anchored on the west coast made a detour to South America and sailed for more than 60 days before reaching the Caribbean Sea to participate in the war. After the canal passes, it takes only eight hours for ships to cross the two oceans. According to the new treaty, before the end of 2000, the Panamanian government will gradually regain all sovereignty and jurisdiction over the Yunhe District. Historically, Panama was once a province of the Republic of Colombia. On November 3, 1903, Panama became independent from Colombia. Fifteen days later, the US-Pakistan Treaty was signed for the occupation of the Yunhe District by the United States. The following year, the United States started construction in the Yunhe District, which was completed in 1914. In 1915, it gained a colony in Panamanian territory, which connected the Pacific and Atlantic Oceans. The Panama Canal has a total length of 81.3 kilometers, crosses the American continent and connects the Pacific and Atlantic Oceans, shortening the voyage along the two oceans by more than 10,000 kilometers. When the United States fought Spain at the end of the 19th century, the United States warships anchored on the west coast made a detour to South America and sailed for more than 60 days before reaching the Caribbean Sea to participate in the war. After the canal passes, it takes only eight hours for ships to cross the two oceans.