America's main two trading partner countries are Britain and Germany. Number of U.S ships were damaged during the journey towards Britain which creates a tension between the partner countries and after world war I America wants to play a role of neutrality.
Step-by-step explanation:
To establish peace congress passed some acts to keep America aside from political involvement which later become source of societal unrest and cause financial loss of country and weakens the economic strength of nation. Congress ordered that America would not participate in trade relation with the countries in war.
Thereafter following this path America started to follow the policy of neutrality and once they faced great loss when their ship get damaged to travel in Britain. That also creates tension among the trading partner countries.