Call of Duty WW2 - Potato Masher Trophy / Achievement Guide - Save 5 allies by throwing away a live enemy grenade. [Bronze]

Mission 2: Operation Cobra
Objective: Reach the AA Gun

Sometimes enemies throw grenades at you, especially on higher difficulties and while you're behind cover. An easy spot for it is in Mission 2: Operation Cobra. After the long tank drive at the start of the mission, you will have to go in an enemy building. In the very first enemy building of the mission, head upstairs and just stand there waiting for enemies to toss grenades from the farm below. The enemies are hiding behind haystacks on the farm and will frequently toss grenades at you. There are also lots of your allies in this spot near you.

When you stand at the balcony leading to the farm you're effectively blocking the path for your allies. This will cause a few of them to get stuck behind you (around 10 allies total). It's super easy to get 5 in one spot here.