Answer:
War is Peace. Freedom is Slavery. Ignorance is Strength. — George Orwell, 1984. These slogans were created by an entity known only as “The Party,” which consist of those in charge of the country.
The first slogan is probably the most contradictory of the three. The people of Oceania believe that the saying War is Peace means that in order to have peace one must tolerate the horrors of war. It does not equate the two as the statement might otherwise suggest. The people fully believe that war is bad and peace is good.
Yet, as in real life, the people have come to the understanding that sometimes one must make terrible sacrifices in order to have a peaceful nation. The war does not take place on the soil of Oceania but instead, somewhere far from it so they don’t see the horrors of the battle, the destruction, the wounded and dead in front of them. They only hear about it through the daily announcements made by the Party.
While this contradiction may seem like a logical reality at first, it becomes less so when the reader realizes that there is actually no war occurring at all. It is a made up fiction created by the Party just to keep the people in line. It is intended to keep their attention focused elsewhere, so that they do not realize how the Party is controlling their every thought and action.
The motto War is Peace indicates how having a shared enemy unites the people of Oceania and helps them remain on a common course. It gives them something to worry about external to the way the country is being run, that is happening somewhere else. It helps to prevent them from becoming consciously aware of the obvious problems in their own society. This mentality, put in place for the benefit of the Party, gives the people someone other than the government to blame for their problems, making them easier to rule.
A state of constant war demonstrates that people are sacrificing for the greater good of the society, pledging their effort and money to the war, and devoting themselves to their country and government. From the Party's point of view, all of this is good in that the more people that invest in and commit to their nation and government, the fewer problems they will perceive.
This saying focuses the people's attention, preventing them from being consciously aware of the obvious problems in their own society, where they are being actively manipulated and controlled. If people find themselves having thoughts counter to accepted government rhetoric, they can quickly distract themselves by thinking about the war and worrying over the possibility of attack.