Aranya parva is the twenty ninth upa parva included in the third maha parva, named as Vana parva or Aranyaka parva in the epic Mahabharata. There are totally eighteen maha parvas, written originally in Sanskrit. Vyshampayana had narrated to Janamejaya the historical events that happened in the forests, including the procurement of Akshayapatra by Yudhishtira on his queries: 

What Yudhishtira and Pandava brothers had done after losing in the dice game?

As per the terms and agreements of the dice games played twice, after losing wealth and kingdom, Yudhishtira and Pandava brothers with Draupadi had left Hastinapura and started to go out of the country to live in exile for twelve years at a forest. Some Brahmins followed them, including the priest Dhaumya Rishi, with fire worshipping materials. They had stayed under a big banyan tree on the bank of Jahnavi River called Pramana on the first night.  

How many persons had followed Yudhishtira when he left Hastinapura in exile?

Dyuta Anudyuta parva is the twenty eighth upa parva included in the second maha parva, named as sabha parva, in the epic, Mahabharata. Various compilations of this epic are numbered differently and this one upa parva may be numbered in a different fashion in them. Vyshampayana had narrated the historical events to Janamejaya, on his queries:

What had been done by Shakuni and Duryodhana after Rajasuya at Indraprastha?

After Rajasuya, Shakunai and Duryodhana at Indraprastha started to enjoy the splendor and beauty of the new Sabha hall of Yudhishtira. 

What happened to Duryodhana when he moved to the new Sabha hall? 

The Indraprastha Sabha (meeting) hall was unique in nature. It had a crystal laid floor which resembled a water tank in the centre on the passageway and Duryodhana had moved to the front side of Shakuni. He had pulled up his attires to avoid getting wet in the water, since he assumed it was water. But the waiters laughed on seeing his dress pulled up and informed him that they were solid crystal-finished floor and he could step or walk on it.

In the next hall, there were similar floors but with some lotus flowers. Duryodhana thought it could be also solid and on stepping straight away there, he fell into the water. His dress had become partially wet, but the security people had given him dried royal clothes immediately since they had stocked for the same purpose, as per the royal instructions. Later, he moved into another hall on the way but hit his forehead with the transparent solid wall since the actual open door was on another side.

Shishupalavadha parva is the twenty seventh upa parva included in the second maha parva, named as sabha parva, in the epic Mahabharata. Various compilations of this epic are numbered differently and this one upa parva may be numbered in a different fashion in them. Vyshampayana had narrated the historical events to Janamejaya, on his queries:

What did Yudhishtira do when the king of Chedi, Shishupala had revolted in the Rajasuya, gathering with his supported kings?

Yudhishtira had consulted Bhishma for further actions needed when the king of Chedi, Shishupala had revolted in the Rajasuya gathering with his supported kings.

What was told by Bhishma?

Bhishma was a senior ruler, aged and experienced. Bhishma told Yudhishtira not to be worried about Shishupala since Krishna had rightfully deserved the first honor.

How Shishupala had abused Bhishma?

Arghyasamarpana parva is the twenty sixth upa parva included in the second maha parva, named as sabha parva, in the epic Mahabharata. Various names are assigned to this upa parva in different versions like Agrapuja, Arghyabhiharana etc. Vyshampayana had narrated the historical events to Janamejaya, on his queries:

What had been observed by Narada during Rajasuyayaga?

Narada had observed the huge pomp and show in the Rajasuyayaga of Yudhishtira. He had simply waited at the entrance gate by hiding using a deer skin. He felt as if God Vishnu was in the seat when Krishna was worshipped there. 

What did Yudhishtira ask Bhishma at the conclusion of Rajasuya?

Rajasuyayaga parva is the twenty fifth upa parva included in the second maha parva, named as sabha parva in the epic Mahabharata. Various compilations of this epic are numbered differently and this one upa parva may be numbered with different sequences in them. Vyshampayana had narrated the historical events to Janamejaya, on his queries:

What was the status of the people in the palace of Yudhishtira when the Rajasuyayaga had been started?

People in the palace of Yudhishtira were leading a very happy life when he started Rajasuya yaga. Under the ruling of Pandava brothers, there were no complaints about anything. People had voluntarily visited the palace to pay their tributes and taxes with duty bound feeling but without any fear of compulsion. Nobody was telling any lies and there were no disputes.  

What was the Rajasuya yaga?

Digvijaya parva is the twenty fourth upa parva included in the second maha parva named Sabha parva in Mahabharata. Various compilations of this epic are numbered differently and this one upa parva may be numbered with different sequences in them. Vyshampayana had narrated the historical events to Janamejaya, on his queries:

In which direction had Arjuna moved for Digvijaya?

Arjuna had moved for the Digvijaya in the northern direction. After getting the blessings of learned scholars for victory, he had started with his army after getting blessings of learned scholars.

Jarasandha vadha is the twenty third upa parva included in the second Maha parva named Sabha parva in the epic, Mahabharata. Vyshampayana had narrated the historical events to Janamejaya on his queries:

How Krishna planned to face Jarasandha with Bhima and Arjuna?

Krishna had accompanied Arjuna and Bhima for facing Jarasandha. They would move without any weapons and enter his palace from the rear door. Then, Jarasandha would fight with Bhima like wrestling, since his two commandos Hamsa and Dibhaka had drowned in the River Yamuna, and their death had been announced.  There were three drums installed on the top of a mountain and they had damaged it on reaching the Magadha town. It was meant for alarming the army so they disabled it.

How the trio Krishna, Bhima and Arjuna had entered the palace of Jarasandha?

Rajasuyarambha is the twenty-second upa parva included in the second Maha parva named Sabha parva in the epic Mahabharata. Various compilations of this epic are numbered differently and this one upa parva may be numbered in a different fashion. Vyshampayana had narrated the historical events to Janamejaya, on his queries:

After the departure of Narada Rishi, Yudhishtira had thought of Rajasuya yaga.

The proposal for conducting Rajasuya by Yudhishtira was known to Draupadi and she verified the royal treasury in their palace.

Lokapala sabha is the twenty-first upa parva or the second upa parva under the second maha parva in Mahabharata. Mantra parva or Sabhakhyana is another name for this upa parva. Vyshampayana had narrated the historical events to Janamejaya, on his queries:

What were the instructions received from the learned scholars to Yudhishtira?

The learned scholars instructed Yudhishtira to start for the performance of the Rajasuya yaga. He was presiding in the meeting and asked various experts regarding Rajasuya yaga and received their assurances for the successful conduction of the same. 

What were the details of kings narrated by Krishna to Yudhishtira?

Sabhabhavana is the twentieth Upa parva, and the first upa parva of the second Maha parva, named Sabha parva, in the epic Mahabharata. Sabhakriya is another name for this upa parva. Vyshampayana had narrated the historical events to Janamejaya, on his queries:

What were the instructions given to Maya, the architect of demons, by Krishna?

Since Arjuna had saved Maya from a fire mishap during the Khandava vana dahana, Maya wished to offer some services to Arjuna but Arjuna directed him to speak with Krishna. Then, Krishna had given special instruction to the demon architect Maya to construct a meeting hall for Yudhishtira.

What did Yudhishtira do to Maya?