World of Tanks Modern Armor

The method is the same for both this and Der Rhine Time achievements.

For this achievement you want to pick MS-1. Equip both Camo net and Binocular telescope, you can also equip camo for your tank. Your main task is to stay invisible.

Mines:
If at north side, stay at A4 and hide in bush. You should be able to snipe both middle and lighthouse/village. Adjust your position, if you see that no one is at village (right side of minimap) then make sure you can spot it. You can kill any attacker without being seen.

If enemy is capping your base, hole close to the border is your safespot. Go behind little rock close to your base (uphill) and you should be able to surprise cappers. You can get nice advantage and take two shots before they can react. Then fall back to hole and disappear. After that you can show up from path side and again surprise your enemy. If enemy is climbing your position, stay behind a rock and shoot his side.

From south side stay at K4 and look at middle, K3 and look at lighthouse. Ignore the village, if something comes from that dirrection, go through K line to rocks close to your base. Use them as cover from hill/middle.

If enemy is capping your base, play it safe and pick your targets from distance. You can get to hill at middle if you have time, if not, get to bushes and snipe. Your enemies are in the open so abuse it.

Province:
Go to G3 (left side) or D8 (right side), wait until bino starts working and snipe. Do not move unless you are seen. Watch out for tracers, you can snipe invisible targets that way, they always stay in the same positions.

MS-1 is more armored, so you can go into front line with this tank. Its superior gun should guarantee advantage over T22 Proto. This is however more risky and you should be aware that your mobility is not your advantage. Play it as a close support.

Alternatively you can take AT-1 which has absolutely wonderful gun. Take any sniping position and you should take enemies with two hits each.