The main purpose of the us passing the neutrality act in 1939 on a “cash and carry” basis was to question 1 options: encourage other countries in central america and south america to send troops to support france limit the spread of nazi influence while remaining neutral, by selling the british and the french supplies declare war on japan and defeat them quickly before joining the war in europe allow the us to secretly funnel money in to germany and japan to fund their war efforts – this led to great profit for the us economy what was the main reason why the us officially joined wwii on the allies’ side? question 2 options: the us was concerned that germany was close to creating and using an atomic bomb in europe the surprise attack at pearl harbor in hawaii on december 7th, 1941, killing americans and destroying american ships and airplanes. the zimmerman telegram was intercepted, and the us was worried that germany was attempting to get mexico to attack from the south all of these