Jesus gave his Great Commission to 11 disciples. It was just before the birthing of the church. I believe that the most effective place and time to mobilize is at the time that churches are being planted. If a church is birthed with a missionary vision, it will also grow with one. I see missions mobilization as a pioneering effort.
Mobilization needs to be done wherever there are churches.
Although Central Europe is not a strong sending base right now, there are many churches being planted that need a missionary vision. I am also mobilizing in former East Bloc countries, where churches for many years were not involved in world missions for obvious reason. Here again, it is pioneering work. Wherever I go, whether in Europe or North America, I see churches that need to be mobilized and I am sure that is true all over the world. I think that at times we are asked to start the fire and at other times to fan the flames.