• The descriptions for tasks to obtain medals, camouflages, achievements, combat tasks etc have been clarified. Now explanations have been improved in the task conditions where the  purpose is to win in a battle or play a required number of battles where it is necessary to finish the battle/mission in a specified vehicle or where it can be used in the battle/mission at any time. If you lose all your vehicles before the end of the battle/mission, the last used vehicle will be taken into account for completing any such tasks.
• The limit for the maximum number of selected achievements has been added. Now there can be no more than 20 of them.
• The conditions for obtaining Italian medals which have been created to reward the citizens of non Italian countries have been clarified. These medals can be obtained by completing tasks in German vehicles. (source)

The current provided changelog reflects the major changes within the game as part of this Update. Some updates, additions and fixes may not be listed in the provided notes. War Thunder is constantly improving and specific fixes may be implemented without the client being updated.