In 2015, how many independent nations were there in the world?

There are 195 countries in the world today. This total comprises 193 countries that are member states of the United Nations and 2 countries that are non-member observer states.

I hope this somewhat helped.

1) union forces launched a surprise attack.

2) more confederate troops arrived by train.

3) union forces retreated.

yes, there are senators in each state