There is one summary for H.R.3166. Bill summaries are authored by CRS.

Shown Here:
Introduced in House (10/12/2011)

Enemy Expatriation Act - Amends the Immigration and Nationality Act to include engaging in or purposefully and materially supporting hostilities against the United States to the list of acts for which U.S. nationals would lose their nationality.

Defines "hostilities" as any conflict subject to the laws of war.