There are basically two type of font:
Serif fonts - such as Times and Courier
Serif fonts are generally more traditional and often slightly more formal then sans serif fonts.
(A serif is the extra little detail at the end of each stroke of every letter).
Sans Serif fonts - such as Ariel and Comic Sans.
Sans Serif fonts are more generally more informal, more modern and more 'friendly'.
In "Pearl Harbor" the font PALATINO is used. It is a serif font because of the little extra bits at the end of each letter. Each letter is spaced out. All the letters are CAPITAL. It looks like it is old fashioned text.
The letters are all the same height as they show oder of a Major event.
In "Rocky" the font used is Franklin Gothic Heavy. It is a Sans Serif font. It is round, big, bold.
It stands out. The font matches with the image because on the image it looks like a silhouette of people.