What does alliances mean in history?

Answer 1

For people to help defend themselves, several countries joined alliances.

Answer 2

An alliance is an agreement made between two or more countries to give each other help if it is needed. When an alliance is signed, those countries become known as Allies.

Answer 3

It means to back the county that you are allied with in a military way

Answer 4

Agreements or pacts between countries to the mutual benefit of those countries.

Answer 5

to be good