1)
What is the significance of Daryavesh ha'Midi's first year?
1.
Rashi: This is when Malchus Bavel fell and Malchus Madai u'Faras began. The Sarim of Madai and Paras requested from Hashem to make the yoke of their rule heavy on you (Yisrael).
2)
Who stood to strengthen whom?
1.
Rashi: I, Gavriel, stood to strengthen your Sar, Micha'el.
2.
Malbim: The angel stood to strengthen Daryavesh – his heart was good towards Yisrael, like Yosifun wrote. Daryavesh found out about the angel's writing that Daniel interpreted, that [Belshatzar] was punished for using Klei ha'Mikdash. He vowed to permit building the Bayis. The angel strengthened to carry out the matter via Daryavesh's son-in-law Koresh.
