@Velund and @Bobko can't with truth in their heart admit the same however regarding Russia I believe.
Admit what, exactly? Not sure I follow.
Lacking a state between Tsarist Russia Imperial Germany lead naturally to conflict.
This is a facile, and ultimately unconvincing argument. History does not support this view.
Specifically during their respective "imperial" periods, Russian and Germany were more often allies than enemies.
In the 1700s, during the "Partitions", we worked together to carve Poland apart. In that period, Poland was clearly not a "buffer", but rather a victim of coordinated imperialism.
During the Napoleonic Wars, Prussia and Russia were allied during key moments. When Prussia was not aiding Russia, was only because of pressure from Napoleon.
Prussia and Russia were both the principal actors in the Congress of Vienna. Austria was the clear "junior" partner within the Holy Alliance, while Prussia and Russia were the two heavyweights. Together, the three powers policed Europe against liberalism for nearly a century.
During the Crimean War, Prussia - crucially - remained neutral. It leaned heavily towards supporting Russia, in its fights against the Ottoman Empire, France, and Great Britain.
Under Bismarck - Russo-German relations reached their absolute peak, and it was only the removal of Bismarck which ruined relations between the countries. Bismarck helped engineer the Three Emperor's League, and was the architect of the Reinsurance Treaty - a secret agreement to keep Germany and Russia friendly.
In WW1 we fought - but because of the tragic incompetence of the Austrians, and not because either of us really wanted to fight the other.
Prior to their invasion of the USSR, we also worked closely with Germany during the opening stages of WW2.
In brief - Germany and Russia nearly always work together, and those instances where they fight are unusual and rare.