Ideally they are all mandatory before we go. Realistically, in some cases the urgency may be such that you cannot have everything in hand before you commit, but I think some things are absolutely critical.
There needs to be the political will of the United Nations. Without that, we are crazy to commit troops to any UN operation.
There needs to be money. We could probably swing that ourselves in a pinch. It's better if money has been committed first.
It's critical, unless we want to invade hostile territory, that we have a host government that is willing to receive us. There has been a lot of talk in the last month about going to the Congo. The President of the Congo is calling for UN troops to leave the Congo. Should we have ever wanted to get into a situation like that? It strikes me as madness, frankly, to even consider that.
We need to have an exit strategy. I don't think we should ever commit to an operation like Cyprus again, where we go in in 1964 and we leave in 1993. The Cyprus operation continues today. There's no political will to fix it, or there hasn't been. I know Joe Clark tried to become Lord Clark of Nicosia, but it didn't work. No fixes have been found for that kind of situation. It seems to me that it doesn't do the United Nations, or the Cypriots, frankly, any good to have an operation that goes on forever and allows them to pretend they're trying to achieve a settlement when they're not.
The key, however, is whether our military has the capabilities to do the job. If it doesn't have the capabilities--and there are some things we may not have the capabilities for--then we should absolutely not commit.