Without the US supplying millions of military hardware to Britain before the US actually became involved with defending Britain then Britain would have been conquered by the Germans.The US went to war when Germany and Japan declared war on us.Most important? Hmmm. What makes them Most important?
the fact that they've been our ally in every war since WWI.
You mean when we had to go save them twice?
The US ended up basically giving Britain 31 BILLION dollars in military aid to Britain.
Read a fucking history book you idiot!