Who (or what) was roosevelt referring to when he said, the hand that held the dagger has struck it into france's back?

On June 10,1940 US president Franklin D Roosevelt gave his famous speech "Stab in the Back" at University of Virginia.

On the speech He mentioned that the hand that held the dagger has struck into it's neighbor's back. Here he referred Italy and Mussolini as the hand which held dagger and France was the neighbor.

Because on June 10,1940 Italy declared war against France and Britain and joined to Germany on axis power. Mussolini said Italy was joining war against France and Britain as for keeping promise to Germany.

Roosevelt mentioned this incident for in his speech as the hand held dagger has struck into France's back.

Moreover, in this speech, He made a proclamation about removing America's neutral position in war and soon declared the Mediterranean see as a combat zone.

Explanation:

regarding the law, the 15th amendment was specifically designed thinking in the rights of black free men.

even though ratified on february 3, 1870, the promise of the 15th amendment would not be fully applied for a long time.poll taxes and literacy tests would allow southern states disenfranchise african americans. only in 1965 the voting rights for african americans would be actually able to vote in the south.

in 1965, president johnson signed the voting rights act, which aimed to overcome legal barriers that prevented african americans from voting as it was guaranteed by the 15th amendment to the u.s. constitution.