Māori people peaceful tribes from their productive turangawaewae, such as the Moriori in the Chatham Islands by invading forces from North Taranaki, had a catastrophic effect on these conquered tribes. At the same time, the Māori suffered high mortality rates for new Eurasian infectious diseases, such as influenza, smallpox and measles, which killed an unknown number of Māori: estimates vary between ten and fifty percent. The spread of epidemics resulted largely from the Māori lacking acquired immunity to the new diseases. A huge influx of European settlers in the 1870s increased contact among many of the indigenous people with the newcomers. Te
Mexican Armed Forces was reorganized in 2007–09 into 30 Naval Infantry Battalions, a paratroop battalion, a battalion attached to the Presidential Guard Brigade, two Fast Reaction Forces with six battalions each, and three Special Forces groups. The Naval Infantry are responsible for port security, protection of the ten-kilometer coastal fringe, and patrolling major waterways. The Mexican Maritime Search and Rescue is the Mexican Navy's SAR Unit, which is responsible for improving the quality and effectiveness of the Navy's response to Mexico's maritime emergencies. The Mexican Navy historically has been responsible for the search and rescue operations using its available resources. However, aware of