St. Matthew's Day
A long time ago, the Pope called crusades for many lands that were not Christian yet, and established knight orders to fight for Christendom and spread the faith. Oftentimes, this was by the sword, as is the case in the Baltic Crusades. The Teutonic Knights were the biggest factor in the crusades, both Livonian and Prussian, but other powers were involved as well. The Swedes and Danes were in the Livonian Crusade, while the Mazovians assisted the Teutons in the Prussian Crusade. The Prussian Crusade was by far the more successful campaign, as the Livonian crusade was only half successful. While modern-day Latvia was successfully taken, the Estonians managed to fight back the crusaders long enough to prevent their annexation. Let's start from the beginning of the end for the crusaders...
Lembitu had successfully rallied the Estonians to fight under one banner to drive out the crusaders. The area of Viljandi was fortified by the Estonians. The crusaders would soon walk into Lembitu's trap, assisted by a man famous in Estonia for drinking the most beer in one go, Kaupo( not to be confused with the other Kaupo, who led the crusading army). Kaupo is also a national hero in Estonia for saving the Estonians' independence. Kaupo is somewhat of a superhero in Estonian folktales, where he supposedly gets stronger the more he drinks, and is never drunk despite drinking more than twice his weight in beer within an hour. He goes around saving people while always carrying beer to boost his strength.
Several primitive mechanisms were installed in the forest near Viljandi in quick time, such as rams to knock out chunks of the army so that Estonians could kill, capture, or maim them. Kaupo himself was to assist the Estonians by leading the crusader army into every single trap, whether it was pitfalls, nets, or rams. Then, once the crusading army was sufficiently weakened, he'd lead the army into a segment of forest where the Estonians would be waiting. Then, he'd signal them to attack the weakened army.
Comparisons have been drawn between the Battle of Teutoburg Forest and the Battle of St. Matthew's Day by Estonian scholars, with both consisting of a technologically superior "civilized" society being routed in battle by "barbarians" who primarily practice war in their spare time. Another similarity is that both the Roman and crusading armies were betrayed from within by a supposedly integrated member of society(e.g. Arminius and Kaupo).
A map of Estonia before the Battle of St. Matthew's Day
The Battle of St. Matthew's Day ended with 2/3 of the crusader army dead, and another 1/6th captured by the Estonians. The leaders of that army, except for Kaupo the turncoat, all were slain by the Estonians. The most valuable thing for the Estonians in this battle was taking the Crusaders' gear, such as armour and swords.
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Several primitive mechanisms were installed in the forest near Viljandi in quick time, such as rams to knock out chunks of the army so that Estonians could kill, capture, or maim them. Kaupo himself was to assist the Estonians by leading the crusader army into every single trap, whether it was pitfalls, nets, or rams. Then, once the crusading army was sufficiently weakened, he'd lead the army into a segment of forest where the Estonians would be waiting. Then, he'd signal them to attack the weakened army.
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A map of Estonia before the Battle of St. Matthew's Day
The Battle of St. Matthew's Day ended with 2/3 of the crusader army dead, and another 1/6th captured by the Estonians. The leaders of that army, except for Kaupo the turncoat, all were slain by the Estonians. The most valuable thing for the Estonians in this battle was taking the Crusaders' gear, such as armour and swords.