Laos maintained close ties with the former Soviet Union and its eastern bloc allies.
Eastern Bloc
command economy
The iron curtain divided the world into the eastern and western bloc.
Controlled economies were common in eastern bloc countries.
Many did in fact escape via other other East European countries, but it wasn't that easy, as contact between the entire Eastern Bloc and the West was controlled.
Any communist country besides the Soviet Union was considered an "eastern bloc satellite nation."
A group of communistic countries, under the rule of the Soviet Union, that were located in Europe and blocked the Soviet Union from European attacks.
More or less, one what you ask is the Eastern Block, but Eastern Europe is not the same (Poland, Hungary, Czech Republic, Slovakia were part of Soviet bloc but they are in Central Europe never Eastern one.) Eastern countries use Cyrillic-based alphabet and used to be related with Byzantine-Russian culture when Western/Central countries use Latin-based alphabet and were more related with Roman culture.
The US has already developed. Many of the emerging former Communist Bloc nations of Eastern Europe could be considered developing.
Notice that Eastern Europe IS NOT the same as Eastern Block, i.e. Poland, Czech, Slovakia, Hungary were part of Eastern Bloc (as communistic states) but have never been in Eastern Europe (but central one or in western cultural circle). SO Eastern Bloc: poverty, communism, lack of personal freedom, highly extended health care and education system, central planned economy (inefficient), subjection to USSR (obligatory under the thread of military intervention) Western Europe: Richness, real democracy, freedom of speech and traveling, lower social expenses, capitalism, subjection to USA (freely).
To establish a defence alliance against the Eastern Bloc countries.