Which prussian officer turned the disorderly continental army into a skilled fighting force?

a.
haym salomon

b.
marquis de lafayette

c.
lord cornwallis

d.
baron friedrich von steuben

i would like if you explain also

ummm? is that supposed to be a question or a but this is a reason he won re-election

explanation:

"despite progress in the war, lincoln and most political pundits were convinced that he would lose his bid for reelection in 1864. the country was war weary and the democratic party's nominee, george mcclellan, was likely to negotiate a peace treaty with the confederacy if elected." - loc.gov

whole lotta ptsd going on