Code new variable based on grep return in R

I have a variable actor which is a string and contains values like "military forces of guinea-bissau (1989-1992)" and a large range of other different values that are fairly complex. I have been using grep() to find character patterns that match different types of actors. For example I would like to code a new variable actor_type as 1 when actor contains "military forces of", doesn't contain "mutiny of", and the string variable country is also contained in the variable actor.

I am at a loss as to how to conditionally create this new variable without resorting to some type of horrible for loop. Help me!

Data looks roughly like this:

|   | actor                                              | country         |
|---+----------------------------------------------------+-----------------|
| 1 | "military forces of guinea-bissau"                 | "guinea-bissau" |
| 2 | "mutiny of military forces of guinea-bissau"       | "guinea-bissau" |
| 3 | "unidentified armed group (guinea-bissau)"         | "guinea-bissau" |
| 4 | "mfdc: movement of democratic forces of casamance" | "guinea-bissau" |