How did the weather contribute to George Washington's defeat at Fort Necessity?

Heavy rain allowed some 800 French and Native American fighters to surround Fort Necessity and fire at Washington's troops from the woods, who believed they would be inside the Fort and formed their ranks in regards to that thought.

we can solve this via the kinematic equation:

where the vertical velocity is zero and so:

since the height of the building is 29.3 meters then:

the ball was in motion for approximately 2.45 seconds