Vatican City is a walled enclave, lying entirely with the city of Rome. It’s area size is only about 44 hectares (10 acres) and has a population of 850. This makes Vatican City the smallest internally recognised independent state in the world – both in terms of area and population.
Being such a small country, the first question is, “Has Vatican City ever been at war?” The answer is “No”. The closest thing to military action was when it was bombed during World War II – twice. The first time in 1943 and the second time a year later.