Jaime Lannister's family is economically wealthy and has a powerful military.
Core countries . They have strong state institutions , a powerful military and powerful global political alliances . Jaime Lannister . Introduced in A Game of Thrones ( 1996 ) , Jaime is a knight of the Kingsguard and a member of House Lannister , one of the wealthiest and most powerful families in the fictional kingdom of Westeros .