Uhm dude, This is talking about causes leading up to the war not the war itself. I'll give you a sunmary but it's a long time since I went to school so there might be some errors.
Germany started to produce more boats and to become more involved with their colonies and global trade. This pissed GB off
Russia wanted to establish a connection to the sea of okotsk with their railways, the problem was that they had to go trough Japanese land for that. Russia tried but lost the war. The russian people were already dissatisfied with their government because of the fact that it was way too centralized and the loss against Japan only made this worse. This is one of the biggest reasons why Russia had to go to war, to save face and appease the population.
There is more but the Khabib mcgregor press conference is starting so if you want to know just reply to this later