Gaza was formed in 1967 when Israel moved Jewish settlements and troops into Gaza. Israel controlled the Strip's borders, coastline and airspace until 2005, when it withdrew. An election was held in January 2006, which Hamas won. Since then, Israel has conducted several wars with Hamas due to alleged terrorist acts, causing much of the infrastructure of Gaza to be non functional. It has been placed under an Israeli and U.S.-led international economic and political boycott since 2006.