How did the people behind Wilson's family lose all of their belongings in the Platte River?

Wilson's family lost all of their belongings in the Platte River due to a tragic accident while they were crossing the river. The wagon they were using became submerged, causing their possessions to be swept away by the strong current. This loss was compounded by the harsh conditions they faced during their journey, making it a devastating setback for the family. Ultimately, the incident highlights the challenges and dangers of travel during that era.