The ornamental design for a military stylecase, as shown and described.
FIG. 1 is a perspective view of a military style case, showing our new design;
FIG. 2 is a top view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a back view thereof;
FIG. 5 is a right view thereof; and,
FIG. 6 is a left view thereof.
A bottom view is not shown as it forms no part of my design.
Those portions of the figures shown in dotted lines form no part of my invention, but are included to show the context and environment of the invention.