This was a seminal battle in 1916 where the strategy of the Germans was to attack French positions from multiple sides and "bleed" the French army into capitulation (The idea being that since France couldn't afford to lose the position, they would throw in every man they had to defend it or capitulate). Despite over 500,000 deaths on both sides, the French were able to successfully hold their position.

It´s the Battle of Verdun.

Explanation:

It was the largest single battle of the First World War and one of the bloodiest ones. It started with a German offensive in February of 1916. The German plan elaborated by Gen. Erich von Falkenhayn called for causing the highest number of casualties to the French Army, a better goal than just gaining ground. It was summarized by the sinister phrase "bleed France to death" used by Von Falkenhayn. The German made quick advances around the Verdun defensive complex in the beginning, but they were stopped. The French troops regained lost positions by December. At the end, the long and brutal battle cost the lives of 600,000 men in both sides.

union blockade

explanation:

the union blockade in the american civil war was a naval strategy by the united states to prevent the confederacy from trading.

the blockade was proclaimed by president abraham lincoln in april 1861, and required the monitoring of 3,500 miles (5,600 km) of atlantic and gulf coastline, including 12 major ports, notably new orleans and mobile. those blockade runners fast enough to evade the union navy could only carry a small fraction of the supplies needed. they were operated largely by british citizens, making use of neutral ports such as havana, nassau and bermuda. the union commissioned around 500 ships, which destroyed or captured about 1,500 blockade runners over the course of the war.