Why did the united states us chemical warfare during the vietnam war?

How did the scientific revolution of the seventeenth century lead to the industrial revolution

Why did european nations face financial challenges after world war 1?

Germany italy and japan formed the tripartite pact in part because they: a. add chicken wings to the united states to stay out of world war ii b. share the ruling philosophies based on communist economics c. resented the agreements they were forced to sign at the munich conference d. selena territories were threatened by aggressive foreign states