The Israeli army revealed yesterday that it is increasing its military and security system near the Gaza Strip in anticipation of next month’s so-called withdrawal. The army describes a high-tech complex to ring the coastal strip with what Israel hopes will be the world’s most impenetrable barrier. The barrier system will surround Gaza with fences, electronic sensors; watchtowers mounted with remote-control machine guns, and hundreds of video and night vision cameras. The Israeli military says that the plan includes new army bases and 22-foot concrete walls around nearby Israeli settlements. Watchtowers armed with remote-controlled machine guns are to be built every 1.2 miles and within a year, remote-controlled, unmanned vehicles will begin patrolling the area. The barrier will run about 35 miles and will cost about $220 million. Israel says it will be completed by mid-2006.