Final answer:
Germany formed the Triple Alliance to isolate France and to protect itself against a potential dual front war with France and Russia.
Step-by-step explanation:
Germany formed the Triple Alliance in 1882 primarily to counteract the potential threat posed by France and to isolate it diplomatically, ensuring France had no allies, which would weaken its power in Europe. German Chancellor Otto von Bismarck was especially concerned about France, given the longstanding Franco-German antagonism following the Franco-Prussian War and the annexation of Alsace-Lorraine by Germany. This was further exacerbated by the subsequent alliance in 1894 between Russia and France, which presented a potential two-front war for Germany.
The Triple Alliance between Germany, Austria-Hungary, and Italy was part of Bismarck's strategic diplomatic efforts to maintain peace in Europe by creating a balance of power. However, this alliance system also contributed to the growing tensions that eventually led to the outbreak of World War I, as countries continued to form and strengthen alliances to protect themselves and assert their influence.