Why did Hashem need to harden Par'oh's heart this time?
Rashi: Because Par'oh was in two minds whether to pursue Yisrel or not. 1
See Sifsei Chachamim.
What does the Torah mean when it writes that Yisrael went out, "b'Yad Ramah"?
Rashi and Targum Yonasan: It means that Yisrael left Egypt in triumph (over the downfall of the Egyptians).
Ramban: Refer to 14:5:2:2 .
Rashbam: They left totally free, unworried about being recaptured - until they saw the Egyptians at the Yam-Suf.
Seforno: They left Egypt with the misconception that, since they outnumbered the Egyptian army, they would be able to defeat them. 1
Seforno: Until they saw them in battle array, with all their chariots. The Torah is demonstrating their total lack of understanding of matters concerning warfare.
