Final answer:
Each pact member brought unique strengths to their alliances based on strategic needs and capabilities; the USSR's strong military, the combined economic and technological prowess of Britain and the US, and the political leverage acquired by the Soviet Union through the Warsaw Pact and the Molotov-Ribbentrop Pact.
Step-by-step explanation:
The strengths each pact member brought to the group varied depending on the specific alliance. During World War II, the Tehran Conference highlighted the strategic importance of each member in the alliance of Britain, the US, and the USSR.
The shared goal to defeat Germany meant that each country had to compromise. The strength of the Soviet Union was its large and powerful military, crucial in the eastern front against Germany. Britain and the US brought industrial and economic strengths, technology, and manpower to the fight.
The Molotov-Ribbentrop Pact was crucial for Nazi Germany as it neutralized the threat from the Soviet Union while they expanded in Western and Northern Europe. For the Soviet Union, the pact provided a buffer zone and additional territory. In the Warsaw Pact, the Soviet Union secured political and military support from its Eastern European satellite states, ensuring a collective defense system against NATO and enhancing its strategic position in Europe.
The Kellogg-Briand Pact, while ideal in its aims, lacked enforcement mechanisms, and many nations would not adhere to its principles, revealing the weakness of mandates without consequences.