Railroad companies own tracks that trains run on to transport goods and people from one place to another. Sometimes, two or more railroad companies may want to use the same tracks to get to a certain place. When this happens, they may start a "Rail War."
Imagine you have two train sets that you want to race on the same track. Each of you believes that your train is the fastest, and you both want to win. But, there's only one track, so you have to figure out who gets to use it first.
The same thing happens in a rail war. Two or more railroad companies want to use the same track to get to their destination, but there's only enough space for one train to pass through at a time. They will sometimes fight over who gets to use the track by trying to block each other's trains or sabotaging the tracks.
This can cause big problems for people who need to use the trains to get around, such as farmers who need to ship their crops or people who need to get to work. To solve the problem, sometimes the government steps in to regulate the use of the tracks to make sure everyone can use them fairly.