Why was the regime in iran overthrown

The overthrow of Iran's elected government in 1953 ensured Western control of Iran's petroleum resources and prevented the Soviet Union from competing for Iranian oil.

Explanation:

In simpler terms, it was overthrown because the west wanted the oil, and to  prevent the Soviet Union from getting the oil.

my cultural heritage consists of irish, german, native american, and others.

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