Tautvilas, Edivydas, and Vykintas formed a powerful coalition in opposition to Mindaugas, along with the Samogitians of western Lithuania, the Livonian Order, Daniel of Galicia (Tautvilas and Edivydas' brother-in-law), and Vasilko of Volhynia.
The princes of Galicia and Volhynia managed to gain control over Black Ruthenia, disrupting Vaišvilkas' supremacy.
Tautvilas strengthened his position by traveling to Riga and accepting baptism by the Archbishop.
In 1250, the Order organized a major raid through the lands of Nalšia into the domains of Mindaugas in Lithuania proper, and a raid into those parts of Samogitia that still supported him.
Attacked from the north and south and facing the possibility of unrest elsewhere, Mindaugas was placed in an extremely difficult position, but managed to use the conflicts between the Livonian Order and the Archbishop of Riga to further his own interests.
He succeeded in bribing Order Master Andreas von Stierland, who was still angry at Vykintas for the defeat at the Battle of Saule in 1236, by sending him "many gifts".

In 1250 or 1251, Mindaugas agreed to receive baptism and relinquish control over some lands in western Lithuania, in return for an acknowledgment by Pope Innocent IV as king.
The Pope welcomed a Christian Lithuania as a bulwark against Mongol threats; in turn, Mindaugas sought papal intervention in the ongoing Lithuanian conflicts with the Christian orders.
On 17 July 1251, the pope signed two crucial papal bulls.
One ordered the Bishop of Chełmno to crown Mindaugas as King of Lithuania, appoint a bishop for Lithuania, and build a cathedral.
The other bull specified that the new bishop was to be directly subordinate to the Holy See, rather than to the Archbishop of Riga.
This autonomy was a welcome development.
The precise date of Mindaugas's baptism is not known.
His wife, two sons, and members of his court were baptized; Pope Innocent wrote later that a multitude of Mindaugas's subjects also received Christianity.

The process of coronation and the establishment of Christian institutions would take two years.
Internal conflicts persisted; during the spring or summer of 1251, Tautvilas and his remaining allies attacked Mindaugas's warriors and the Livonian Order's crossbow-men in Voruta Castle.
The attack failed, and Tautvilas' forces retreated to defend themselves in Tviremet Castle (presumed to be Tverai in Samogitia).
Vykintas died in 1251 or 1252, and Tautvilas was forced to rejoin Daniel of Galicia.
Tautvilas, Edivydas, and Vykintas formed a powerful coalition in opposition to Mindaugas, along with the Samogitians of western Lithuania, the Livonian Order, Daniel of Galicia (Tautvilas and Edivydas' brother-in-law), and Vasilko of Volhynia. The princes of Galicia and Volhynia managed to gain control over Black Ruthenia, disrupting Vaišvilkas' supremacy. Tautvilas strengthened his position by traveling to Riga and accepting baptism by the Archbishop. In 1250, the Order organized a major raid through the lands of Nalšia into the domains of Mindaugas in Lithuania proper, and a raid into those parts of Samogitia that still supported him. Attacked from the north and south and facing the possibility of unrest elsewhere, Mindaugas was placed in an extremely difficult position, but managed to use the conflicts between the Livonian Order and the Archbishop of Riga to further his own interests. He succeeded in bribing Order Master Andreas von Stierland, who was still angry at Vykintas for the defeat at the Battle of Saule in 1236, by sending him "many gifts".
In 1250 or 1251, Mindaugas agreed to receive baptism and relinquish control over some lands in western Lithuania, in return for an acknowledgment by Pope Innocent IV as king. The Pope welcomed a Christian Lithuania as a bulwark against Mongol threats; in turn, Mindaugas sought papal intervention in the ongoing Lithuanian conflicts with the Christian orders. On 17 July 1251, the pope signed two crucial papal bulls. One ordered the Bishop of Chełmno to crown Mindaugas as King of Lithuania, appoint a bishop for Lithuania, and build a cathedral. The other bull specified that the new bishop was to be directly subordinate to the Holy See, rather than to the Archbishop of Riga. This autonomy was a welcome development. The precise date of Mindaugas's baptism is not known. His wife, two sons, and members of his court were baptized; Pope Innocent wrote later that a multitude of Mindaugas's subjects also received Christianity.
The process of coronation and the establishment of Christian institutions would take two years. Internal conflicts persisted; during the spring or summer of 1251, Tautvilas and his remaining allies attacked Mindaugas's warriors and the Livonian Order's crossbow-men in Voruta Castle. The attack failed, and Tautvilas' forces retreated to defend themselves in Tviremet Castle (presumed to be Tverai in Samogitia). Vykintas died in 1251 or 1252, and Tautvilas was forced to rejoin Daniel of Galicia.
Mindaugas