To me there seems to be major problems with how in the real world peace keeping and disaster relief are handled.
Firstly there is the speed at which these operations take place, first there is the vote but even after this there is then the agreements over who will send what, what role the resources sent will be used for, etc.
Secondly there is the disjointed aspect of the forces sent to perform these tasks, they are drawn from different services and from different countries so they will have communication difficulties, supply difficulties and the simple difficulty of having been trained in totally different ways.
What I am proposing is that a small force both civil and military personnel should be set up that would be able to be deployed very swiftly to problem areas to either deal with the problem or to coordinate the follow up.
To do this each nation should pledge a certain amount of men and materials to this force and that this force be assembled and trained together as soon as possible.