Initially they did not ally with Russia because Russia had allied with Germany. Once Germany attacked Russia and broke the pact the Russians wanted to ally with Britain and France. They eventually did.
England France and Russia
To help France and Russia defeat Germany. Britain wanted Germany to lose WWI, so they joined France and Russia. Britain was worried that if Germany won WWI, they would be too powerful for England to defeat by themselves, so they joined France and Russia and declared war on Germany.
Britain and France sees both Russia and Germany as potential threats ,after the Russian revolution Russia was hitting hard in world politics and economy so Britain and France hoped for a typical war between Russia and Germany (as Germany was becoming the world superpower ).Their was that If Russia And Germany could collide one would destroy another and there will be at least one enemy wipped out or weekend and would be easy to handle,this strategy was called as satisfying spree but unfortunately Russia and Germany came under an agreement not to attack each other ,that's why France and Britain refuses the Russian overtures for alliance though they gave (as announced) their full support to Russia when Russia managed to stop Germany's progress in Stalingrad .
A. France B. Germany C. Great Britain D. the United States
Germany is the country located between France and Russia.
France
if France and russia were allies, they could attack Germany on two sides
On July 31 Germany sent a 24-hour ultimatum requiring Russia to halt its mobilization and an 18-hour ultimatum requiring France to promise neutrality in the event of war between Russia and Germany.
france
....Russia and France were partners in an offensive/defensive treaty they had concluded earlier. So declaring war on Russia according to the Treaty 'automatically' meant that a state of war came to exist between Germany and France.
Serbia assassinated arch duke Ferdinand Austria attacked Serbia Russia attacked Austria because they were allied to Serbia Germany attacked Russia because Germany was allied to Austria France and England were allies of Russia, so Germany attacked France France was then in war with Germany
....Russia and France were partners in an offensive/defensive treaty they had concluded earlier. So declaring war on Russia according to the Treaty 'automatically' meant that a state of war came to exist between Germany and France.
Because they could not just start a war with was as there was a thing called the triple entente which was an alliance between Russia England and France
The dual alliance of 1892 between France and Russia arose from fear of Germany.
Germany Russia Brittain France Austria
France Supported, Russia because of a pact they have made and are very good importing/exporting partners.But, France said that France will only support Russia if Germany attacked first .However, Unaware of the Russian-french pact Germany attacked.