What did Hitler and Stalin each gain from the Russo- German nonaggression pact

For Germany, a nonaggression pact would guard against a two-front war and, pending an exchange of German technology for Russian raw materials, neutralize a British blockade. Soviet thought followed along similar lines; Poland would serve as a buffer state against any future German expansion

Explanation:

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two months after his defeat of napoleon bonaparte's colonial forces, jean-jacques dessalines proclaims the independence of saint-domingue, renaming it haiti after its original arawak name. in 1791, a slave revolt erupted on the french colony, and toussaint-louverture, a former slave, took control of the rebels.

c it says nothing about connecting those 2 seas.