Britain's Indirect Role in Acquiring the United States as an Ally

I wanted to comment on how the United States got involved in the war, and why. The United States got involved in the war mainly because of German's unrestricted submarine based blockade of Germany, which ended up destroying many United States ships heading towards Great Britain. Ironically, Great Britain had been doing the same thing with Germany, albeit slightly differently- since the beginning of the war, neutral ships that were Germany-bound, including the United States, were redirected to Great Britain. Because of this, United States trade benefitted the allies almost entirely exclusively. Germany's naval blockade was mainly an attempt to match Britain's own control of the seas. Additionally, because so little trade had reached Germany's shores, they assumed that any United States ships in the area were Britain bound, and were destroyed. So, indirectly, Britain's blockade and regulation of United States trade with Germany brought the United States to the side of the Allies.