In chapter 32 we experience the request of 2.5 tribes to receive their portion of land on the other side of the Jordan. They had dealt in cattle and sheep and the grazing land on that side of the Jordan was much better for their needs.
In 32:6 Moshe responds to their request. His initial response is to ask (rhetorically), “Will your brothers go to war, and you will sit here?” In other words Moshe was saying that it was wrong for them to take this land and begin to settle it while the rest of the nation goes to war.
After some discussion, in verses 16-19 we see they return with the response that Moshe was looking for. They say they will put their families into their land and they will continue on to help their brethren conquer the land and they will not go back until everybody else is settled each in his own parcel of land.
The message is clear. We cannot divest responsibility from acting on behalf of our brothers. We are one nation. We are all responsible for one another. When one part of our nation goes to battle, we all go to battle. When one is found in a crisis situation, we are all in the same crisis. We are all obligated to participate together and equally in our national struggle.
Looking at the current events, we can all be proud of the fact that we do feel this message applies to us. Even if at other times we fight and bicker and criticize each other. In the time of crisis we all come together and somehow find ways to help and support each other.