Battlestations: Midway follows the story of naval recruit Henry Walker, whose first assignment as a gunner at Pearl Harbor is the starting point of an incredible career at the heart of the US Pacific Fleet in 1942, in what was to become one of the most inspirational military campaigns in history. This v1.1 patch mainly addresses multiplayer issues.
Battlestations Midway Patch 1.1:
Fixes multiple issues with Internet and LAN play
Improves NAT enabled network functionality
Changes version number to 1.1 on Main Menu
Source: WP