What are the treaties and alliances designed by Otto von Bismark between 1872 and 1887? Also, what were the diplomatic goals regarding France,...

It's
important to note that this question specifically begins its analysis in 1872. This is not by
coincidence: 1871 was a critical year in the nineteenth century which saw the unification of
Germany under Prussian domination.

Bismark's diplomatic and political
maneuvering were motivated out of a desire to expand Prussian power and influence, and he proved
energetic and decisive in pursuing that goal, utilizing both diplomacy and warfare to attain
those ends. These various efforts of expanding Prussian influence culminated in the
Franco-Prussian War, which saw Prussia overwhelm and humiliate one of the traditional Great
Powers of Europe, a victory which inspired the creation of the German Empire under Prussian
leadership.

The results of the Franco-Prussian War signaled throughout Europe
that the continental balance of power had shifted. Thus, the more established Great Powers would
be inclined to see Germany as an emergent threat within Europe (with France particularly
hostile, given the humiliation it had suffered). With that in mind, it became necessary for
Germany to reach out to potential allies in order to stabilize its position.

Initially, as early as 1873, Bismark attempted to form an agreement with
Austria-Hungary and Russia. (If successful, this would have stabilized the Germany's eastern
front.) However, this system was undermined by tensions between Russia and Austria-Hungary.
Germany formed the Dual Alliance with Austria-Hungary in 1879 and later, in 1882, the Triple
Alliance was formed between Germany, Austria-Hungary, and Italy.

These
alliance systems were primarily defensive in nature. Bismark was concerned about future wars
targeting Germany, and through these alliances, he sought to discourage attacks from Germany's
rivals (and in addition, to have allies in the event that this discouragement failed).

However, in many respects, these efforts backfired, as the growing power of Germany
(and the alliances Bismark had constructed for its defense) ultimately motivated the creation of
a competing alliance system, which would play such a key role in shaping the First World
War.