Army Sled Dogs Take Exam Before Shipping Out To Be Military Dogs

The video covers the Sled Dog School's commencement exercises, highlighting a final test where dogs haul a 10-ton army truck, substituting for a 200 horsepower engine. The dogs successfully pass their trials and are deployed for army hauling and scouting duties in northern frontiers.

What kind of vehicle do the dogs haul during their final test?

What does the phrase 'Doggone it' imply in the context of the text?