Who was removed as general of the Union army for ordering his men to charge across an open field while being attacked by Confederate soldiers

 November 1862

Battle of Antietam

Frustrated that McClellan had again failed to destroy Lee's army, Lincoln officially removed him from command in November 1862.

Explanation:have a good day

angle a = 40.6°

step-by-step explanation:

for any right angle triangle we know the pythagoras theorem reveals

hypotenuse² = height²+base²

by this formula we will calculate the length of hypotenuse

h² = 6²+7²

⇒ h =√36+49 = √85 = 9.22

now from the given triangle sin a = height/ hypotenuse

                                                sin a = 6/9.22 = 0.651

therefore

so angle a = 40.6°

an economic reason that the south needed a reconstruction plan is that plantations, factories, and other businesses were destroyed during the war.