Marines of 2/5 secured the northwest end of Tulagi without opposition and then joined Edson's Raiders in their advance towards the southeastern end of the island. The Marines advanced towards the southeast end of the island throughout the day while defeating a few isolated pockets of Japanese resistance. Around noon, Suzuki repositioned his main defenses into a line on a hill—called Hill 281 (Hill 280 in some sources) by U.S. forces based on its elevation—and a nearby ravine located at the southeast end of the island. The Japanese defenses included dozens of tunneled caves dug into the hill's limestone cliffs and machinegun pits protected by sandbags. The Marines reached these defenses near dusk, realized they did not have enough daylight left for a full-scale attack, and dug in for the night.