With the smallest population of any nation, approximately 900, it is difficult to form a squad. The Vatican City squad consists entirely of employees of the Vatican: police officers, postal workers, government officials and members of the Pontifical Swiss Guard, the Vatican's de facto army, charged with protecting the pope. Since most Vatican citizens are members of the Swiss Guard, they cannot be amassed in large numbers for a long time.

Therefore, the national team has played only a few rare international matches, often drawing a fair amount of interested press. When Vatican City played its first match in 2002, only one player, Marcello Rosati, had a Vatican passport. In 2010, Vatican City was invited to participate in the Viva World Cup by the N.F.-Board and were expected to participate but were unable to do so because they could not assemble a 15-man roster.

In total, Vatican City have played only four full international matches against other nations, one draw and three defeats to Monaco in 2002, 2011, 2013, and 2014 respectively.

More Info: en.wikipedia.org