IV, Holy Roman Emperor, whom Ladislaus I had supported against Pope Urban II in his last years, wrote a letter to Duke Álmos. He stated that Coloman had "neglected" his "interests because of his own necessities" and asked Álmos to intervene on his behalf at Coloman. However, the kinga former bishopdid not continue his predecessor's foreign policy and joined the pope's camp. Historian Gyula Kristó writes that the fact that his brother, Álmos had for years had a close relationship with Emperor Henry may also have influenced Coloman's decision. Coloman invaded Croatia and participated himself in the campaign in 1097. Taking advantage of Coloman's absence, Álmos began to conspire against the king and mustered his armies. Coloman returned from Croatia and marched towards his brother's duchy with his troops in 1098. The two armies encountered at Tiszavárkony, only the river Tisza separated them. However, the commanders of the two troops started negotiations and decided not to fight against each other, compelling Coloman and Álmos to make a peace. Final confrontation The conflict was renewed a few years later between the two brothers, when Coloman had his four-year-old son, Stephen, crowned in 1105, which resulted in the open rebellion of Álmos. The duke left Hungary and sought the assistance of Emperor Henry IV against the king. However, he realized that the emperor, who was facing a rebellion of his own son, could not help him. Álmos returned to Hungary in 1106, but soon fled to his brother-in-law, Boleslaw III of Poland. With Polish assistance, he took the fortress of Abaújvár in Hungary. As a result, Coloman had a meeting with Boleslaw III and the two monarchs "vowed perpetual friendship and brotherhood". Without the Polish monarch's support Álmos was forced to yield to Coloman. King Coloman decided to take advantage of the absence of Álmoswho had made a pilgrimage to the Holy Landand seized his duchy in 1107 or 1108. Although Álmos was allowed to keep his own private property, the annexation of his duchy ensured the integrity of Coloman's kingdom. Having returned from the Holy Land, Álmos decided to set up a monastery at Dömös. On the occasion of its consecration, where Coloman was also present, Álmos wasfalsely, according to the Illuminated Chronicleaccused of an assassination attempt on the monarch. Coloman decided to have his brother arrested, but "the most reverend bishops and other well-disposed dignitaries" intervened on Álmos's behalf and