Grant policy to win the war was one of

attrition

Explanation:

In 1864, General Grant began the "final campaign" against Richmond and to take this time he used the so-called war of attrition. That is due to the numerical advantage of the Union from 2 to 1 against a qualitatively superior Confederate force (better led and fighting in the field of origin). In a series of battles (Wilderness, Spotsylvania, Cold Harbor), Grant advanced about 60 miles in a month, at a cost of approximately 60,000 men, approximately a 2 to 1 loss ratio (compared to around 30,000 for the Confederates) .

When these tactics earned him the nickname "Butcher Grant," his response was: "I will fight in this direction if it is taken all summer."

Once its proximity to Richmond reduced the maneuvering capacity of the Confederates, the Union accident rate dropped from 3 to 2, and ultimately from 1 to 1, condemning the Confederates in numerical inferiority.

. political or economical policy that isolates a country from participating in international relationships. it has been suggested that the united states participates in isolationism because of its lack of involvement in particular wars or alliances.