Sniper Elite 4 fast way to get 'Ambush king' trophy

Right at the start of mission 4, Lorino dockyard, be stealthy, but fast. I only take out the soldier overlooking the road. Now be fast, but don't get spotted. Place a teller mine on the road (you need to equip this in your loadout). Now make a save before the truck blows up. In the truck are an officer and 4 soldiers. So after the multi landmine kill, just reload your save. Repeat this and get a 100 kills like this. That will earn you the 'ambush king' trophy 😁 easy 👌