Battlefield 1
50 Achievements
Play the Objective
Complete 25 Squad Orders in multiplayer
How to unlock the Play the Objective achievement in Battlefield 1 - Definitive Guide
Press the right bumper over an objective such as a capture point in conquest works for both attacking or defending once the objective has been successfully taken or defended you will recieve a notification in green stating squad objective achieved earning you some bonus points.
Simply rinse and repeat 24 more times.
Only the squad leader can set orders, so your best bet it to create your own squad when you join a new game so that you are always the squad leader.
In a multiplayer game, press over objectives such as captures points in conquest mode. Once an objective has been successfully captured if you are attacking or defended if you are defending, the squad order will be successfully completed. You'll see a notification on the screen to confirm and will also receive some bonus XP points.
Do this 25 times in total and the trophy will unlock.
An easy way to do this trophy is to be the leader of the squad. You can easily do this be making your own squad and doing things like tagging objectives. While you're squad leader you need to hold on an objective marker and it issues a squad order to attack or defend it. Once the objective is tagged all you need to do is go to it and either capture the objective or defend it depending on if you’re either attacking or defending the point. You don’t need anyone else in your squad in order to get this trophy. Do this 25 times and you will get the trophy.
To unlock this achievement you will need to complete twenty-five squad orders in multiplayer. When you're in a squad, the squad leader can/will issue orders which almost always will be to either attack a point or defend a point. So playing on Conquest or Operations is the way to go to get a squad leader who is more inclined to give orders. You can't give much of any orders in Team Deathmatch, so for this achievement stick to the objective based game modes. You will know when a squad order has been given as there will be four green arrows around an objective. When you see this, attack/defend that objective and if you're successful in doing so, the squad order will be complete, you will get a decent amount of points/xp for it and a plus-one to this achievement. Do this twenty-four more times and the achievement is yours.
It will also depend on having a squad leader that knows how to give commands or is interested i doing so, so if you're on a squad and getting no orders, leave that squad and try to join another with a better leader.
NOTE: Despite the wording of the achievement, it is possible to get credit towards this even when you're the squad leader. Credit to jroller1979 and Grey Delta for confirming this.