There are two questions here:
When was Israel founded? -- May 14, 1948.
Why is Israel at war with most of its neighbors? -- This is a very complex question which is more fully addressed at this related question: What are the causes of the Arab-Israeli Conflict?
Since the modern State of Israel was founded in May, 1948 .
The Modern State of Israel was founded in 1948 which makes it 65 years old as of 2013.
The modern State of Israel was founded in the territory of the former British Mandate of Palestine in May 14, 1948.
It was found long before 1937, but it was not founded until 1948.
The modern, present-day State of Israel was created in May, 1948, by its own citizens and leaders, who are commonly termed: Zionists.
The Ancient Kingdoms of Israel never abandoned the monarchic model until they were overthrown. The Modern State of Israel was founded as a democracy and never had a king.
The state of Israel was founded in 1948.
Although it was founded under the title of "The State of Israel", Israel is considered a modern country. For most countries, the word "state" means the same thing as "country". Think of Israel as a country with only 1 state in it. So it can be called either word.
Saul became the first king of Israel in 878 BCE. The country of Israel was founded four centuries earlier by Joshua.After conquest and absorption into the Roman Empire nearly 2000 years ago, the modern State Israel was re-established on May 14, 1948.
The Modern State of Israel has never ceased being a country since it was founded in 1948. If the question is referring to the Biblical Kingdom of Northern Israel, it was conquered by the Assyrians in 722 B.C.E. If the question is referring to the last Jewish State to fall before the establishment of the Modern State of Israel it is the Hasmonean Kingdom which fell to the Romans in 63 B.C.E.
No. The Ancient Northern Kingdom of Israel was conquered by Assyria, but that is the extent of the relationship between Israel and Assyria. The modern State of Israel was founded by the descendants (2600+ years later) of the Ancient Southern Kingdom of Judah.
The Modern State of Israel is not yet conquered.