Anonymous:
"Madagascar’s “cactus war” of the 1920s, when French scientists and colonialists waged biological warfare against “Malagasy cactus” (raketa gasy, O. monacantha) with a cochineal cactus parasite (pondy foty, Dactylopius tomentosus), has received some attention of late. I return briefly to it here to highlight that colonial officials who were fervently against prickly pear cactus welcomed the occasion to operate a “modernist laboratory” aimed at advancing cactus pastoralists into the modern age."

Kindly check the bold words "I return briefly to" and tell me whether it is correct as it is used. Thank you very much.
"Madagascar’s “cactus war” of the 1920s, when French scientists and colonialists waged biological warfare against the “Malagasy cactus” (raketa gasy, O. monacantha) with a cochineal cactus parasite (pondy foty, Dactylopius tomentosus), has received some attention of late. I return briefly to it here to highlight that the colonial officials who were fervently against prickly pear cactus welcomed the opportunity occasion to operate a “modernist laboratory” aimed at advancing cactus pastoralists into the modern age."

I return briefly to it ...only appropriate if you have already mentioned it elsewhere, which seems unlikely from the rest of the text.

I've made a couple of other corrections for you too.
Veteran Member11,782
Proficient Speaker: Users in this role are known to maintain an excellent grasp of the English language. You can only be promoted to this role by the Englishforums team.Retired Moderator: A moderator who has retired.
Anonymous:
Thank you nona the brit. So I leave that "I return briefly to" thing as is?
Only if the subject has been discussed before this paragraph. If it is the first time the subject has been raised, "I return briefly" is incorrect.
Veteran Member5,006
Proficient Speaker: Users in this role are known to maintain an excellent grasp of the English language. You can only be promoted to this role by the Englishforums team.Retired Moderator: A moderator who has retired.
Nona The BritI return briefly to it here to highlight that the colonial officials who were fervently against prickly pear cactus welcomed the opportunity occasion to operate a “modernist laboratory” aimed at advancing cactus pastoralists into the modern age."
Hi Nona

In some other languages it is possible to make a difference in meaning by including or omitting the article (the) before colonial officials. With the inclusion of the, all the colonial officials are meant whereas without the only some of them are meant. I would consider this possible in English as well; in other words, the original sentence without the appears correct to me.

This is from Webster's Unabridged Dictionary:

oc·ca·sion, n.
1. a particular time, esp. as marked by certain circumstances or occurrences: They met on three occasions.
2. a special or important time, event, ceremony, celebration, etc.: His birthday will be quite an occasion.
3. a convenient or favorable time, opportunity, or juncture: This slack period would be a good occasion to take inventory.
4. the immediate or incidental cause or reason for some action or result: What is the occasion for this uproar?
5. (in the philosophy of Alfred North Whitehead) the coincidence of the eternal objects forming a specific point-event.
6. occasions, Obs.
a. needs or necessities.
b. necessary business matters: to go about one's lawful occasions.
7. on occasion, now and then; from time to time; occasionally: She visits New York on occasion.

It seems Noah Webster's disciples welcome the use of occasion in the sentence as well.

Cheers
CB
Veteran Member7,899
Proficient Speaker: Users in this role are known to maintain an excellent grasp of the English language. You can only be promoted to this role by the Englishforums team.Trusted Users: Trusted users are allowed to use additional capabilities of the site such as private messaging to all users and various other advanced features. You cannot join this role unless you are promoted by an administrator.
Live chat
Registered users can join here