The Brethren movement has played a remarkable part in world mission. We often fail to grasp the sheer scale of Brethren-heritage churches worldwide that result from this mission work. There are some 25,000 congregations in at least 155 countries worldwide, and in addition some 10,000 or more preaching points, some of which may become congregations before long. There are countries in Africa where these churches are very strong, such as Zambia, Congo, Angola and Chad, which together have more than 5,000 congregations. In Papua New Guinea, over 450 congregations have been planted since 1960. The resulting national groups are now sending churches. Argentina, for example, now has over 30 missionaries serving God in other countries. The groups described in more detail below are a powerful network of missionary effort from the UK.