why did the united states government promote higher education and research in fields such as agriculture and science with the morrill land grant college acts?

The lands were to be sold to provide an endowment for the establishment of "at least one college where the leading object shall be, without excluding other scientific and classical studies and including military tactics, to teach such branches of learning as related to agriculture and the mechanic arts.

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.