What disease infected nearly every man on the Lewis and Clark expedition? How was it treated?

Syphilis

Explanation:

Syphilis, it was treated because Lewis and Clark brought a vaccine, for it. They where infact well prepare to treat the disorder.

a big wall across the mexican border so no drugs, terrorist, or illegal immigrants can come through : )    

"germany's geographic location was an advantage when it was on the offensive in the war because it was situated next to an extremely wide river, the rhine, which was difficult for the allies to cross."