Answer:
The challenge faced by Washington's army in their attack on Treton was icy and freezing storm.
Step-by-step explanation:
The Battle of Tretorn was a surprise attack of Washington's attack on British army at Treton at the daybreak of 26th December, 1776. It is asserted that the army of Colonel Johann Rall was asleep in the drunkeness due to Christmas celebration.
Washington had planned attack on Treton on the eve of Christmas but due to rough weather, their arrival was delayed. They rowed their boats through icy waters and stretched forward through the freezing storm. These weather conditions were the challenges faced by Washington's army in their attack on Treton.