History of Latvia between 2000 BC - 1 BC
In about 2000 BC a new wave of colonists flowed into the Baltic area from the South. They settled down in East Prussia, Lithuania and Southern Latvia. This invasion continued in the Bronze Age (1500—500 BC) and the older Iron Age (500—0 BC). During these periods two cultural routes are playing a great part in the development of Baltic culture. One of these leads over East Prussia to Central Europe, the other across the sea to Scandinavia.
Some forms of graves, tools, arms, and burial customs lead one to suppose that the continuous development of these prehistoric cultural forms of the Baltic is sufficient to prove that the bearers of this civilization were the forefathers of the present Baltic nations. Thus, the ethnic history of these people can be traced back to about 2000 BC.
At the beginning of our era the common original Baltic culture had already branched into the Western (later Borussian or Ancient Prussian) and Eastern (later Lithuanian and Latvian) cultures. Even in that age, as is shown by archaeology and linguistics, the relations in culture and trade between the Balts and the Finno-Ugrians were considerable and close. At any rate, this development took place some time before the Teutons established direct contact with both races.
The Bronze Age (1500–500 BC) witnessed the transition from an economy based on food procurement to one based on food production. Stock-keeping and agriculture became increasingly important. In the Older Iron Age (500 BC - 0 AD), the first iron objects came into use.
Reference: Latvians.com
From its origin as a small stronghold built by the ancient Illyrian tribe Dalmatae, becoming a royal castle that was the seat of many Croatian kings, to its final development as a large fortress during the Ottoman wars in Europe, Klis Fortress has guarded the frontier, being lost and re-conquered several times. Due to its location on a pass that separates the mountains Mosor and Kozjak, the fortress served as a major source of defense in Dalmatia, especially against the Ottoman advance, and has been a key crossroad between the Mediterranean belt and the Balkan rear.
Since Duke Mislav of the Duchy of Croatia made Klis Fortress the seat of his throne in the middle of the 9th century, the fortress served as the seat of many Croatia"s rulers. The reign of his successor, Duke Trpimir I, the founder of the Croatian royal House of Trpimirović, is significant for spreading Christianity in the Duchy of Croatia. He largely expanded the Klis Fortress, and in Rižinice, in the valley under the fortress, he built a church and the first Benedictine monastery in Croatia. During the reign of the first Croatian king, Tomislav, Klis and Biograd na Moru were his chief residences.
In March 1242 at Klis Fortress, Tatars who were a constituent segment of the Mongol army under the leadership of Kadan suffered a major defeat while in pursuit of the Hungarian army led by King Béla IV. After their defeat by Croatian forces, the Mongols retreated, and Béla IV rewarded many Croatian towns and nobles with 'substantial riches'. During the Late Middle Ages, the fortress was governed by Croatian nobility, amongst whom Paul I Šubić of Bribir was the most significant. During his reign, the House of Šubić controlled most of modern-day Croatia and Bosnia. Excluding the brief possession by the forces of Bosnian King, Tvrtko I, the fortress remained in Hungaro-Croatian hands for the next several hundred years, until the 16th century.
Klis Fortress is probably best known for its defense against the Ottoman invasion of Europe in the early 16th century. Croatian captain Petar Kružić led the defense of the fortress against a Turkish invasion and siege that lasted for more than two and a half decades. During this defense, as Kružić and his soldiers fought without allies against the Turks, the military faction of Uskoks was formed, which later became famous as an elite Croatian militant sect. Ultimately, the defenders were defeated and the fortress was occupied by the Ottomans in 1537. After more than a century under Ottoman rule, in 1669, Klis Fortress was besieged and seized by the Republic of Venice, thus moving the border between Christian and Muslim Europe further east and helping to contribute to the decline of the Ottoman Empire. The Venetians restored and enlarged the fortress, but it was taken by the Austrians after Napoleon extinguished the republic itself in 1797. Today, Klis Fortress contains a museum where visitors to this historic military structure can see an array of arms, armor, and traditional uniforms.