Germany encouraged the formation of the league of 3 empire in the way to isolate France.
The formation of the Dual Aliance between Austria and Germany to support each other in case of war with Russia.
In 1885 Bulgaria declared complete independence from Turkey. Russia protested and it led the collapse of the league of 3 empire.
The signing of the re-insurance treaty in 1887 between Germany and Russia, aimed at preventing the Franco-Russian Alliance.
In 1898 Britain and France declared war over Egypt war almost erupted in Sudan but the problem was solved.
In 1902 Russia and France formed the Dual entrant to contract the triple Alliance. The aim was to assist each other if attacked by Germany.
Britain and Japan in 1902 formed the Anglo-japanese Alliance in case any of them was attacked by Russia.
In 1904 Britain and france formed the entent cordiale to support each other in case of war.
In 1905 France and Germany clashed over morocco in what became known as the First morokian crises. Britain and Russia supported France against Germany during the Algerian conference in Spain(1906)
In 1907 Britain, France and Russia formed the triple entent to support each other in times of war.
France and Germany in 1911 clashed again over morocco in what was known as second morokian crises Britain and Russia supported France. Germany accepted to abandon morocco to France in exchange of French equatorial Africa that is the Agadir incident.
On the 23th of June 1914 the first world war was declared and on the 11th November 1918 at 11: am the war ended.