Small scale manufacturing industries in cottage industries play a very important role in the economic development of India if any amount of capital is invested in small scale industries it will help in reducing unemployment in India and increasing self employment
The answer to the missing blank above would be 'the Mongols'. The Mongols invaded Russia around 1300s, which arose to economic downfall and overall negative effect to Russia. Because of this, the Russian princes convened and fought to drive Mongols out of the country.
Spain was founded in 20 January 1479. I'm not sure but I think it was by Christopher Columbus.