What is the 6th president

The 6th President of the USA was John Quincy Adams

hope this helps ;)

c. troops marched forward in close formation against newer, more accurate weapons

the  seven  days  battles  were  a series of seven battles over seven  days from june 25 to july 1, 1862, near richmond, virginia,  during  the american civil war. the  seven  days ended with mcclellan's army in relative safety next to the james river, having suffered almost 16,000 casualtiesduring  the retreat.