Which sentence has correct capitalization?

One Commander of the Continental Army was President George Washington.
One commander of the Continental Army was President george washington.
One commander of the Continental Army was president George Washington.
One commander of the Continental Army was President George Washington.

Question

Which sentence has correct capitalization?

    One Commander of the Continental Army was President George Washington.  
    One commander of the Continental Army was President george washington.   
    One commander of the Continental Army was president George Washington. 
    One commander of the Continental Army was President George Washington.

anonymous · Answer

Names must be capitalized. Titles must be capitalized.

anonymous · Answer

For the word, "commander", the sentence starts with "a". That means there is more than one commander, which means that the word "commander" isn't a proper noun in this situation. There fore, the 4th sentence would seem to be the best solution.