Answer:
The US gave them aid secretly
Step-by-step explanation:
To provide a covert aid simply means to provide aid in secrecy. The US has been using this way of funding for numerous guerrilla groups throughout the world because of their interest in certain country or region. This has been mostly the case in Latin America, as the US regularly was providing covert aid for guerrilla fighters in almost all countries in this particular region. The reason for this type of action by the US was its economic and political interest in the region, but unfortunately their actions caused much more damage than they did good, resulting in large anti-American sentiment in Latin America.