https://wccftech.com/battlefield-v-open-beta-date-contents/

Prior to Gamescom 2018, EA has revealed a release date and fresh details for the Battlefield V open beta. In early September players will get to test out classic Conquest mode on the Rotterdam and Artic Fjord maps, get a feel for the new Grand Operations mode, and even get started on the Tides of War story campaign. Here are a few more details, courtesy of EA:

Player can jump into the up 64-player Conquest mode on the Rotterdam map, set in the embattled Holland city, or the Arctic Fjord map, set in icy Narvik, Norway. In Conquest, you must battle for control of key locations on a massive multiplayer map, using the new Fortifications, towable weaponry, and Squad Reinforcements system.