First missile acquisitions left air defence lacking any short range missile systems to protect important targets and key forces. This role was covered by radar-guided artillery systems like 35mm Oerlikon KD or 57mm S-60, however, they were few in number and their range insufficient against some threats. S-60, particularly, was rejected already in 1960 as an "obsolete weapon" - and then bought anyway 15 years later. SHORAD acquisition was long and drawn-out process. Since first missiles were bought from USSR, it was decided that SHORAD system would be bought from the West. Despite this, several Soviet systems were also evaluated. Of various requirements, mobility, all-weather operation and good performance envelope (range & ceiling) were thought paramount. One problem was that when the project got underway (mid-80s), first generation systems were getting obsolescent and newer systems might be politically difficult to acquire. US & UK were traditionally sensitive about selling modern military equipment to Finland, and Roland had to be dropped out as Paris Peace Treaty made acquiring German made systems impossible. Anyway, one by one, candidates were narrowed down:

-SA-13 and RBS-70 were too short-ranged and lacked all-weather capability
-SA-8 was viewed being obsolescent tube technology (note the problems maintaining same generation technology in SA-3), and also overpriced.
-Rapier Blindfire was obsolescent, lacking in range and overpriced. Finns requested information about Rapier 2000, but British refused, undoubtely believing that Finns would immediately sell it to nearest GRU agent.
-Skyguard was lacking in mobility, also the missile (Sparrow) was American and export license might not be granted.
-ADATS seemed for long a front-runner, but it was lacking in all-weather capability, and eventually, US would not grant export license. This was probably a blessing in disguise, as ADATS ended up having a rocky development path.

Crotale was eventually a clear winner, particularly after French offered a completely new NG-variant at very reasonable price. It featured new, very capable Vought VT-1 missile, and entire system, along with radar, could be integrated to one armoured vehicle - for example, Finnish XA-180, resulting to intimidating looking system. Original plan called for 16 batteries (32 vehicles) at first phase, later expanded to 30: it was a major disappointment that only ten units (20 vehicles) were acquired. Nevertheless, Crotale was a huge boost to Finnish air defence capabilities as the system was truly top-notch. Total cost of 20 vehicles was over 900 million Marks (240 million Euros in modern currency): about same as the cost of later Buk acquisition.

Sensor equipment was extensive: surveilance radar, fire control radar, TV camera, IR detector and FLIR. All are integrated to vehicle turret. Surveilance radar was frequency-hopping doppler radar, it could handle 20 targets at one time, and track 8 of them simultaneously, at range of 18 kilometres. Fire control radar was frequency-hopping monopulse radar with range of about 20 kilometres. FLIR could detect targets from up to 15 kilometres range under good conditions. In addition to normal radar guided mode, missile could be fired using either of two different optic backup methods. Radar was so sensitive that it was calculated that stealth aircraft could be targeted near maximum firing range, which was 11 kilometres. Although the system could fire at only one target at the time, flight time of the missile was so short (10 seconds to 8 kilometres) that flight of four aircraft could be shot down in less than a minute, this capability was later demonstrated in training. Operationally, Crotale battery was coupled with separate mobile surveilance radar and ZU-23 batteries.

Of course not everything was perfect. As the system was so new, there were some teething problems which attracted some embarrassing publicity. First firings resulted to several misses: proximity fuze failed to detect small targets and there were problems with datalinks. These issues were solved.

Initial training was done in France: training course was well-executed, though schedule was puzzlingly loose, with hours of time reserved for matters which were handled in 15 minutes: apparently the French were used to less experienced foreign trainees. Spare time proved no problem as it left more time for practical training. English skills of some of the teachers was not the best and could be described as 'Franglish'.

Russian general Pavel Grachev visited Finland in 1993 and told the press that Crotale was a crappy system and Finns should have used their money on Russian systems. Finns pointed out that none of these mythical systems had been offered to Finland at the time: SA-15 was presented to Ahti Lappi in 1993. It might have been a serious entry had it been offered five years earlier, but Lappi's impression was that its fire control system was much more basic than Crotale's.

Crotale MLU program was started 2004. Designation was ItO-90M. Not much detail is provided about the modernisation, it seems however that new, longer ranged missiles are integrated.