Arjuna's five-year training with Indra and Chitrasena directly causes the five-year period of the Pandavas' exile in Kamyaka forest without Arjuna, as the narrative states that five years pass while Arjuna is away training.

Vidura's earlier warning to Dhritarashtra (in ss_aranyaka_302) that defeating the Pandavas would bring about the end of the Kurus is the specific counsel that Dhritarashtra recalls in ss_aranyaka_345, making it a necessary precondition for his recollection.

The visit of the allied kings, led by Krishna, to the Pandavas in Kamyaka forest is the event that Sanjaya reports to Dhritarashtra, directly causing Dhritarashtra's fear and the Kaurava council's pledge to prepare for war.

Bhima's argument for war triggers Yudhishthira's deep sorrow and questioning of his fate, which Brihadashva addresses by telling the Nala story; this episode is the direct continuation where Brihadashva consoles Yudhishthira after the tale.

Bhima's aggressive urging for war causes Yudhishthira to lament his misfortunes, which directly prompts the arrival of sage Brihadashva, who then comforts Yudhishthira with Nala's tale to pacify his despair.