FORT SILL, Okla. -- Based on recent extremist attacks targeting Canadian military, the FBI has posted a bulletin warning U.S. service members to use caution when traveling for the holidays.

The Islamic State, or ISIL, is calling for attacks against the U.S. military and are seeking citizens here to carry out the attacks.

"There's no direct messaging saying Fort Sill or Oklahoma is a target, but there are incidents out there where people have either been radicalized or they're a home grown violent extremist and they're looking for that opportunity," said Fort Sill anti-terrorism officer Robert Daul.

Daul said the first step to safe traveling is being aware of the area you are going to and know their attitude toward the military.

"You're not going to want to go blindly into something like a city or town where they don't like the military and present yourself as a target."

Daul said attracting the least amount of attention while traveling is wise and only travel in uniform if it's on orders.

"Just being out there in uniform gives them that target of opportunity. It's like leaving your car unlocked for a theif; it's a target of opportunity for criminals to go in your car."

Recruiting

ISIL is pushing propaganda in the U.S. promising a better life for someone who radicalizes and attacks service members. They're spreading that message in magazines and online offering things like instant families and careers.

Several women from Colorado bought into the message, but were stopped before they made it to Syria.

"That's not what they're getting when they get there. They thought: I'm going to get my 2.3 kids, and a house ... When they get there they find out it's rocks and desert and not suburban living. Or oh hey women are treated differently here," said Daul.

He said those who chose to be radicalized find it as a way to get out of their current situation.

"It's like a used car salesman, he's going to make the car sound like it's the best car that ever was, but then you get into it and find out differently."

Those who can't make the trip are using social media to find targets to accomplish the ISIL mission. Daul said everyone should review their online presence to make sure no information can be used against them.

-Only establish and maintain connections with people you know and trust. Review your connections often.

-Assume anyone can see any information about your activities, personal life, or professional life that you post and share.

-Ensure that your family takes similar precautions with their accounts; their privacy and sharing settings can expose your personal data.

-Avoid posting or tagging images of you or your family that clearly show your face. Select pictures taken at a distance, at an angle, or otherwise concealed. Never post Smartphone photos and don't use your face as a profile photo, instead, use cartoons or avatars.

-Use secure browser settings when possible and monitor your browsing history to ensure that you recognize all access points.

"If you put things on your Facebook: I'm traveling, I'm moving, and you don't put those filters on, then anyone can track your movement," said Daul.

ISIL has also taken to hijacking hashtags on Twitter. Recently they used hashtags associated with premier English soccer league clubs such as #MUFC, #WHUFC, #LFC, and #THFC. When tweets went out with these hashtags, they were instantly associated with their own message.

For several weeks in early 2014, ISIL supporters were able to download a Twitter app from the Google Play Store called "The Dawn of Glad Tidings" or "Dawn" for short. The app was advertised as a way to receive updates on ISIL's efforts. Once a user downloaded the app, it would automatically post ISIL materials to each user's Twitter account, spacing the tweets out at a rate and in numbers that would not alert Twitter's anti-spam detectors. Each user essentially became a server for dissemination of ISIL propaganda materials. When ISIL stormed Mosul, the app posted 40,000 tweets in a single day. The app has since been removed from the Google Play Store after being available for several weeks.

Daul recommends the following ways to protect yourself before traveling this holiday season:

-Review anti-terrorism/force protection level I training

-Review privacy settings on social media pages

-Limit any reference, current or former, to military, government or law enforcement employment on social media

-Remove license plate holders, stickers, and other visual items on your vehicle that may affiliate you or family members to the military, government or law enforcement

-Consider manner of dress when out in public, to include shirts, hats, jackets, etc. that reference military, government or law enforcement affiliation

Soldiers, civilians and family members should call 800-CALL-SPY, (800-225-5779) an Armywide number to report suspicious activity to military intelligence. Locally call iWatch, 580-558-0000, to report suspicious activities on Fort Sill.