How can you sort Microsoft Project 2013 tasks by date that are in different subtask sections?

How can you sort Microsoft Project tasks by date that are in different subtask sections?
I have 500+ task with a task on line 11, 25, 143, 175 & 400 (different subtask sections) all occurring on the same day.
The sort option (down arrow in the Start and Finish title bar) only completes a sort within each of the subtask sections.

Thank you for your assistance.
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stepnharpAuthor Commented:
Solved.  Found on other forum.

Go to View > Data group > Sort > Sort by to bring up the Sort window. Then uncheck the "keep outline structure" option near the bottom of the Sort window.

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