Muslim civil engineer constructing buildings for armies fighting against Muslims

Q: I am working as a civil engineer. We deal with construction of buildings and other structures. Sometimes we have to work for the army of disbelievers (kuffar) who are presently fighting against Muslims. We have to construct buildings and other structures for them... Is it allowed for us to work for them although we have no intention to help them on their anti Islamic sentiment. Remember our land is under oppression.

Inheritance

Q: I want to find out about inheritance on a will. I am married Islamically and had to get court married due to my work (company benefits). I am drafting a will and wanted to find out. I purchased a house before marriage, is it permissible to state on the will the house is half mines and half my wife's. And what are the inheritance percentages for my mother my brother and 2 sisters. I only have my wife and daughter that inherit from me as well. Can the percentages be given for all.