Question

When Japan and Germany began their aggressive actions overseas, many Americans believed that it's two great oceans protected the u.s the passage of which law,however, showed that Americans were beginning to have doubts about this "traditional " defense

Answer 1

Japan started to move around and conquer other lands moving closer to Germany but then Teddy Roosevelt came in and helped japan and Germany come to an agreement winning him a noble peace prize.

Hope dis helps

Answer 2

If its the law it might be the selective training  and service act.