Q. Which are the countries in Triple Alliance?
Answer: Italy, Germany, Austria
Notes: In order to isolate France in World War I, Germany entered in to an alliance with Austria. Bismarck formed the three Emperors League by making alliance with Russia. Later Germany did not care for Russia. Hence Russia left. But Germany continued its alliance with Austria alone. This was known as Dual alliance. After Italy joined in this alliance, it became a Triple alliance.