A former Methodist minister, William Booth, founded The Salvation Army in the
  slums of London during 1865. Booth wanted to make the church more
  accessible to the whole community at a time when many poor and working
  class people were excluded from the churches. Originally known as the
  Christian Mission, the name 'The Salvation Army' was adopted in 1878 and
  since then the organisation's structure has been based on military lines.

  Initially Booth's Mission intended to gather the poverty stricken multitudes of
  London's East End and link them up with existing churches. However, such
  people were regarded as outcasts and not welcomed by the wealthy and
  respectable church members of the day. As a result, Booth was forced to
  provide a more permanent organisation for the ongoing spiritual care of his
  converts.

Booth's concern for the destitute masses of England was not only spiritual.The more he learned of the plight of the thousands spurned by Britain's industrial revolution, the more determined he was to see lasting social change.

From the Army's earliest days, various social programs grew up alongside the mission's spiritual ministry, including food shops, shelters, and homes for 'fallen' girls. However, these were just the first elements in a broad scheme.In the early 1890s,
Booth published In Darkest England - and the Way Out, an ambitious and complex plan to deliver England from its social woes.

Soon Booth opened labor exchange services, which would place thousands of unemployed persons in jobs. Discovering that some 9,000 people dropped from sight in London each year,
he established a missing persons bureau.

He dreamt of a farm colony where the unemployed could be given
honest labour and pleasant surroundings. He wanted to establish
a poor man's bank, he offered legal aid to the destitute; and he envisaged
an emigration scheme that would develop a new overseas colony.
During the 1890s, the Army established an employment bureau and
helped find jobs for the unemployed. Work was also provided at
Salvation Army salvage depots and rescue farms. From this began a social
service network that continues today in 120 countries of the world.