Germany and Japan seriously underestimated Americans ability to ?

Germany and Japan seriously underestimated Americans ability to produce war supplies.

Explanation:

Germany and Japan both were superior in troops and weapons production. They were technologically upgraded and master mind in planning the supply procurement time to time. They underestimated Americans ability to produce war supplies.

In world war I air, water and land all three space were occupied for fighting. Defense, navy and air force were in charge of setting the required weapons and troops. America was good enough to produce naval weapons. German and Japan commanders and soldiers were mainly underestimate the ability of America.

president thomas jefferson commissioned the expedition shortly after the louisiana purchase in 1803 to explore and to map the newly acquired territory, to find a practical route across the western half of the continent, and to establish an american presence in this territory before britain and other european powers

b) the confederacy had to pay all union war expenses.