Why did sir john Franklin and his crew sail?

Sir John Franklin and his crew set sail in 1845 to find the Northwest Passage, a sought-after sea route that would connect the Atlantic and Pacific Oceans through the Arctic. This expedition aimed to enhance British trade and territorial claims in the region. Unfortunately, the voyage ended in tragedy, with Franklin's ships becoming trapped in ice, leading to the crew's eventual demise. The expedition remains one of the most famous mysteries in Arctic exploration.